/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-RepeatedVariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-25 07:38:49,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-25 07:38:49,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-25 07:38:49,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-25 07:38:49,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-25 07:38:49,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-25 07:38:49,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-25 07:38:49,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-25 07:38:49,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-25 07:38:49,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-25 07:38:49,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-25 07:38:49,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-25 07:38:49,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-25 07:38:49,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-25 07:38:49,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-25 07:38:49,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-25 07:38:49,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-25 07:38:49,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-25 07:38:49,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-25 07:38:49,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-25 07:38:49,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-25 07:38:49,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-25 07:38:49,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-25 07:38:49,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-25 07:38:49,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-25 07:38:49,676 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-25 07:38:49,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-25 07:38:49,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-25 07:38:49,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-25 07:38:49,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-25 07:38:49,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-25 07:38:49,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-25 07:38:49,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-25 07:38:49,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-25 07:38:49,681 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-25 07:38:49,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-25 07:38:49,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-25 07:38:49,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-25 07:38:49,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-25 07:38:49,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-25 07:38:49,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-25 07:38:49,693 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-RepeatedVariableLbe.epf [2021-03-25 07:38:49,723 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-25 07:38:49,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-25 07:38:49,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * Use SBE=true [2021-03-25 07:38:49,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-25 07:38:49,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-25 07:38:49,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-25 07:38:49,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-25 07:38:49,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-25 07:38:49,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-25 07:38:49,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:38:49,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-25 07:38:49,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-25 07:38:49,731 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-25 07:38:49,731 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-03-25 07:38:49,731 INFO L138 SettingsManager]: * Apply repeated Lipton Reduction=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-25 07:38:50,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-25 07:38:50,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-25 07:38:50,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-25 07:38:50,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-25 07:38:50,021 INFO L275 PluginConnector]: CDTParser initialized [2021-03-25 07:38:50,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c [2021-03-25 07:38:50,092 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7f6cd/ad0dabff37ee49e582575a3bc44f5899/FLAGc3ab97fa1 [2021-03-25 07:38:50,547 INFO L306 CDTParser]: Found 1 translation units. [2021-03-25 07:38:50,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/regression/mainThreadTerminates.c [2021-03-25 07:38:50,548 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-25 07:38:50,548 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2021-03-25 07:38:50,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7f6cd/ad0dabff37ee49e582575a3bc44f5899/FLAGc3ab97fa1 [2021-03-25 07:38:51,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25c7f6cd/ad0dabff37ee49e582575a3bc44f5899 [2021-03-25 07:38:51,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-25 07:38:51,058 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-25 07:38:51,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-25 07:38:51,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-25 07:38:51,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-25 07:38:51,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6304f4fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51, skipping insertion in model container [2021-03-25 07:38:51,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-25 07:38:51,080 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-25 07:38:51,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-25 07:38:51,215 INFO L203 MainTranslator]: Completed pre-run [2021-03-25 07:38:51,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-25 07:38:51,237 INFO L208 MainTranslator]: Completed translation [2021-03-25 07:38:51,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51 WrapperNode [2021-03-25 07:38:51,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-25 07:38:51,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-25 07:38:51,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-25 07:38:51,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-25 07:38:51,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,250 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-25 07:38:51,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-25 07:38:51,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-25 07:38:51,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-25 07:38:51,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... [2021-03-25 07:38:51,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-25 07:38:51,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-25 07:38:51,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-25 07:38:51,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-25 07:38:51,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-25 07:38:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-25 07:38:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure worker_thread [2021-03-25 07:38:51,353 INFO L138 BoogieDeclarations]: Found implementation of procedure worker_thread [2021-03-25 07:38:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-25 07:38:51,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-25 07:38:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-25 07:38:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-25 07:38:51,355 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-25 07:38:51,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-25 07:38:51,547 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-03-25 07:38:51,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:38:51 BoogieIcfgContainer [2021-03-25 07:38:51,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-25 07:38:51,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-25 07:38:51,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-25 07:38:51,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-25 07:38:51,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.03 07:38:51" (1/3) ... [2021-03-25 07:38:51,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106af656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:38:51, skipping insertion in model container [2021-03-25 07:38:51,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.03 07:38:51" (2/3) ... [2021-03-25 07:38:51,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106af656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.03 07:38:51, skipping insertion in model container [2021-03-25 07:38:51,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.03 07:38:51" (3/3) ... [2021-03-25 07:38:51,554 INFO L111 eAbstractionObserver]: Analyzing ICFG mainThreadTerminates.c [2021-03-25 07:38:51,558 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-25 07:38:51,561 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-25 07:38:51,561 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-25 07:38:51,576 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,577 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,578 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,578 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,578 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,578 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,579 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,580 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,582 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,582 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,582 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,582 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,583 WARN L313 ript$VariableManager]: TermVariabe |worker_threadThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,583 WARN L313 ript$VariableManager]: TermVariabe worker_threadThread1of1ForFork0_~x~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-25 07:38:51,586 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-25 07:38:51,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-25 07:38:51,615 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-25 07:38:51,616 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-25 07:38:51,616 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-25 07:38:51,616 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-25 07:38:51,616 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-25 07:38:51,616 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-25 07:38:51,616 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-25 07:38:51,616 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-25 07:38:51,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 55 flow [2021-03-25 07:38:51,646 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-25 07:38:51,646 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:38:51,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 16. Up to 2 conditions per place. [2021-03-25 07:38:51,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 55 flow [2021-03-25 07:38:51,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 22 transitions, 47 flow [2021-03-25 07:38:51,653 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:38:51,660 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 24 places, 22 transitions, 47 flow [2021-03-25 07:38:51,663 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 24 places, 22 transitions, 47 flow [2021-03-25 07:38:51,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 24 places, 22 transitions, 47 flow [2021-03-25 07:38:51,671 INFO L129 PetriNetUnfolder]: 2/22 cut-off events. [2021-03-25 07:38:51,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:38:51,672 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 2/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2021-03-25 07:38:51,673 INFO L142 LiptonReduction]: Number of co-enabled transitions 90 [2021-03-25 07:38:52,040 INFO L154 LiptonReduction]: Checked pairs total: 47 [2021-03-25 07:38:52,040 INFO L156 LiptonReduction]: Total number of compositions: 15 [2021-03-25 07:38:52,042 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 390 [2021-03-25 07:38:52,048 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2021-03-25 07:38:52,048 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-25 07:38:52,048 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:38:52,049 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-25 07:38:52,049 INFO L428 AbstractCegarLoop]: === Iteration 1 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:38:52,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:38:52,053 INFO L82 PathProgramCache]: Analyzing trace with hash 110225757, now seen corresponding path program 1 times [2021-03-25 07:38:52,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:38:52,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467081143] [2021-03-25 07:38:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:38:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:52,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:52,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467081143] [2021-03-25 07:38:52,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-25 07:38:52,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-25 07:38:52,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979353295] [2021-03-25 07:38:52,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-25 07:38:52,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:38:52,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-25 07:38:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-25 07:38:52,180 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 40 [2021-03-25 07:38:52,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:38:52,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 40 [2021-03-25 07:38:52,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:38:52,213 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:38:52,213 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:38:52,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 10 events. 1/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 14. Up to 6 conditions per place. [2021-03-25 07:38:52,215 INFO L132 encePairwiseOnDemand]: 37/40 looper letters, 5 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2021-03-25 07:38:52,215 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 10 transitions, 37 flow [2021-03-25 07:38:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-25 07:38:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-25 07:38:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2021-03-25 07:38:52,223 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7416666666666667 [2021-03-25 07:38:52,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2021-03-25 07:38:52,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2021-03-25 07:38:52,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:38:52,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2021-03-25 07:38:52,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,232 INFO L185 Difference]: Start difference. First operand has 11 places, 8 transitions, 19 flow. Second operand 3 states and 89 transitions. [2021-03-25 07:38:52,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 10 transitions, 37 flow [2021-03-25 07:38:52,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 36 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 07:38:52,236 INFO L241 Difference]: Finished difference. Result has 13 places, 9 transitions, 30 flow [2021-03-25 07:38:52,237 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=13, PETRI_TRANSITIONS=9} [2021-03-25 07:38:52,238 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 2 predicate places. [2021-03-25 07:38:52,238 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:38:52,238 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 13 places, 9 transitions, 30 flow [2021-03-25 07:38:52,239 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 13 places, 9 transitions, 30 flow [2021-03-25 07:38:52,239 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 9 transitions, 30 flow [2021-03-25 07:38:52,241 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:38:52,242 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:38:52,242 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 10 events. 1/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 13. Up to 4 conditions per place. [2021-03-25 07:38:52,242 INFO L142 LiptonReduction]: Number of co-enabled transitions 12 [2021-03-25 07:38:52,261 INFO L154 LiptonReduction]: Checked pairs total: 1 [2021-03-25 07:38:52,261 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-25 07:38:52,262 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 24 [2021-03-25 07:38:52,262 INFO L480 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 28 flow [2021-03-25 07:38:52,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,263 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:38:52,263 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-25 07:38:52,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-25 07:38:52,263 INFO L428 AbstractCegarLoop]: === Iteration 2 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:38:52,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:38:52,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1447243669, now seen corresponding path program 1 times [2021-03-25 07:38:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:38:52,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718491168] [2021-03-25 07:38:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:38:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:52,281 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,282 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,282 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,285 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:52,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718491168] [2021-03-25 07:38:52,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618668325] [2021-03-25 07:38:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 07:38:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:52,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-25 07:38:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 07:38:52,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,342 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,358 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,369 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,369 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,370 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,374 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,381 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:52,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 07:38:52,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-25 07:38:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104497590] [2021-03-25 07:38:52,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-25 07:38:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:38:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-25 07:38:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-25 07:38:52,385 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 41 [2021-03-25 07:38:52,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 28 flow. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:38:52,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 41 [2021-03-25 07:38:52,385 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:38:52,400 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:38:52,400 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-03-25 07:38:52,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 11 events. 1/11 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2021-03-25 07:38:52,401 INFO L132 encePairwiseOnDemand]: 38/41 looper letters, 6 selfloop transitions, 3 changer transitions 0/11 dead transitions. [2021-03-25 07:38:52,401 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 11 transitions, 54 flow [2021-03-25 07:38:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 07:38:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 07:38:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2021-03-25 07:38:52,402 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7195121951219512 [2021-03-25 07:38:52,403 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:38:52,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,405 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,405 INFO L185 Difference]: Start difference. First operand has 12 places, 8 transitions, 28 flow. Second operand 4 states and 118 transitions. [2021-03-25 07:38:52,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 11 transitions, 54 flow [2021-03-25 07:38:52,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 52 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-25 07:38:52,406 INFO L241 Difference]: Finished difference. Result has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,406 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=15, PETRI_TRANSITIONS=9} [2021-03-25 07:38:52,407 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 4 predicate places. [2021-03-25 07:38:52,407 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:38:52,407 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,408 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,410 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:38:52,411 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-25 07:38:52,411 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 1/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 20. Up to 5 conditions per place. [2021-03-25 07:38:52,411 INFO L142 LiptonReduction]: Number of co-enabled transitions 12 [2021-03-25 07:38:52,457 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-25 07:38:52,457 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 07:38:52,457 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 50 [2021-03-25 07:38:52,458 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 8 transitions, 36 flow [2021-03-25 07:38:52,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,458 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:38:52,459 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2021-03-25 07:38:52,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-25 07:38:52,668 INFO L428 AbstractCegarLoop]: === Iteration 3 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:38:52,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:38:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1109974937, now seen corresponding path program 1 times [2021-03-25 07:38:52,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:38:52,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892268545] [2021-03-25 07:38:52,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:38:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:52,703 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,703 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892268545] [2021-03-25 07:38:52,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476638260] [2021-03-25 07:38:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 07:38:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-25 07:38:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 07:38:52,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,753 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,757 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:52,758 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,758 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,759 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,760 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,764 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,765 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,766 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,767 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,768 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,772 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,775 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,776 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,778 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,779 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,780 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,780 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,782 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:52,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,783 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:52,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:52,784 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,785 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,786 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:52,786 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:52,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 07:38:52,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-25 07:38:52,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220100481] [2021-03-25 07:38:52,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 07:38:52,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:38:52,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 07:38:52,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-25 07:38:52,788 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 43 [2021-03-25 07:38:52,789 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 8 transitions, 36 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,789 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:38:52,789 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 43 [2021-03-25 07:38:52,789 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:38:52,803 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:38:52,803 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-25 07:38:52,803 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 11 events. 1/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/12 useless extension candidates. Maximal degree in co-relation 28. Up to 6 conditions per place. [2021-03-25 07:38:52,804 INFO L132 encePairwiseOnDemand]: 40/43 looper letters, 6 selfloop transitions, 3 changer transitions 0/11 dead transitions. [2021-03-25 07:38:52,804 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 11 transitions, 64 flow [2021-03-25 07:38:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 07:38:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 07:38:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2021-03-25 07:38:52,805 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.686046511627907 [2021-03-25 07:38:52,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:38:52,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2021-03-25 07:38:52,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,808 INFO L185 Difference]: Start difference. First operand has 13 places, 8 transitions, 36 flow. Second operand 4 states and 118 transitions. [2021-03-25 07:38:52,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 11 transitions, 64 flow [2021-03-25 07:38:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 52 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-03-25 07:38:52,809 INFO L241 Difference]: Finished difference. Result has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,809 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=42, PETRI_PLACES=15, PETRI_TRANSITIONS=9} [2021-03-25 07:38:52,809 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 4 predicate places. [2021-03-25 07:38:52,810 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:38:52,810 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,810 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,810 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 9 transitions, 42 flow [2021-03-25 07:38:52,813 INFO L129 PetriNetUnfolder]: 1/11 cut-off events. [2021-03-25 07:38:52,813 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-25 07:38:52,813 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 11 events. 1/11 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 20. Up to 5 conditions per place. [2021-03-25 07:38:52,813 INFO L142 LiptonReduction]: Number of co-enabled transitions 12 [2021-03-25 07:38:52,861 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-25 07:38:52,862 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 07:38:52,862 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 52 [2021-03-25 07:38:52,862 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 8 transitions, 36 flow [2021-03-25 07:38:52,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:52,863 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:38:52,863 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2021-03-25 07:38:53,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 07:38:53,083 INFO L428 AbstractCegarLoop]: === Iteration 4 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:38:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:38:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1052716635, now seen corresponding path program 1 times [2021-03-25 07:38:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:38:53,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799028410] [2021-03-25 07:38:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:38:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:53,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-25 07:38:53,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,114 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:53,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799028410] [2021-03-25 07:38:53,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220701276] [2021-03-25 07:38:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 07:38:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-25 07:38:53,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-25 07:38:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-25 07:38:53,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-25 07:38:53,171 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,172 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,172 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,173 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,173 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:53,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:53,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:53,183 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:53,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:53,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:53,186 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,189 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,189 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,190 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,190 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:53,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:53,194 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:53,194 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-03-25 07:38:53,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-25 07:38:53,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-03-25 07:38:53,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-25 07:38:53,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-25 07:38:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-25 07:38:53,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-25 07:38:53,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-25 07:38:53,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251050051] [2021-03-25 07:38:53,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-25 07:38:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-25 07:38:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-25 07:38:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-25 07:38:53,201 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 45 [2021-03-25 07:38:53,201 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 8 transitions, 36 flow. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:53,201 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-25 07:38:53,201 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 45 [2021-03-25 07:38:53,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-25 07:38:53,216 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:38:53,216 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 07:38:53,216 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 10 events. 1/10 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 24. Up to 5 conditions per place. [2021-03-25 07:38:53,216 INFO L132 encePairwiseOnDemand]: 41/45 looper letters, 4 selfloop transitions, 4 changer transitions 0/10 dead transitions. [2021-03-25 07:38:53,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 10 transitions, 56 flow [2021-03-25 07:38:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-25 07:38:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-25 07:38:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2021-03-25 07:38:53,218 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.65 [2021-03-25 07:38:53,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 117 transitions. [2021-03-25 07:38:53,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 117 transitions. [2021-03-25 07:38:53,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-25 07:38:53,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 117 transitions. [2021-03-25 07:38:53,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:53,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:53,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:53,220 INFO L185 Difference]: Start difference. First operand has 13 places, 8 transitions, 36 flow. Second operand 4 states and 117 transitions. [2021-03-25 07:38:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 10 transitions, 56 flow [2021-03-25 07:38:53,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 46 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-03-25 07:38:53,222 INFO L241 Difference]: Finished difference. Result has 16 places, 9 transitions, 46 flow [2021-03-25 07:38:53,222 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=46, PETRI_PLACES=16, PETRI_TRANSITIONS=9} [2021-03-25 07:38:53,222 INFO L343 CegarLoopForPetriNet]: 11 programPoint places, 5 predicate places. [2021-03-25 07:38:53,222 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-25 07:38:53,222 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 16 places, 9 transitions, 46 flow [2021-03-25 07:38:53,222 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 16 places, 9 transitions, 46 flow [2021-03-25 07:38:53,223 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 16 places, 9 transitions, 46 flow [2021-03-25 07:38:53,225 INFO L129 PetriNetUnfolder]: 1/10 cut-off events. [2021-03-25 07:38:53,225 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-03-25 07:38:53,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 10 events. 1/10 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2021-03-25 07:38:53,225 INFO L142 LiptonReduction]: Number of co-enabled transitions 12 [2021-03-25 07:38:53,252 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-25 07:38:53,252 INFO L156 LiptonReduction]: Total number of compositions: 2 [2021-03-25 07:38:53,253 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 31 [2021-03-25 07:38:53,253 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 9 transitions, 50 flow [2021-03-25 07:38:53,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-25 07:38:53,253 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-25 07:38:53,253 INFO L263 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2021-03-25 07:38:53,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-25 07:38:53,468 INFO L428 AbstractCegarLoop]: === Iteration 5 === [worker_threadErr0ASSERT_VIOLATIONASSERT, worker_threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-25 07:38:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-25 07:38:53,468 INFO L82 PathProgramCache]: Analyzing trace with hash -995458333, now seen corresponding path program 1 times [2021-03-25 07:38:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-25 07:38:53,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312867248] [2021-03-25 07:38:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-25 07:38:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 07:38:53,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 07:38:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-25 07:38:53,482 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-25 07:38:53,493 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-25 07:38:53,493 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-25 07:38:53,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-25 07:38:53,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.03 07:38:53 BasicIcfg [2021-03-25 07:38:53,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-25 07:38:53,509 INFO L168 Benchmark]: Toolchain (without parser) took 2451.22 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 235.0 MB in the beginning and 211.2 MB in the end (delta: 23.8 MB). Peak memory consumption was 110.0 MB. Max. memory is 16.0 GB. [2021-03-25 07:38:53,509 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:38:53,510 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.39 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 235.0 MB in the beginning and 325.9 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-25 07:38:53,510 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.28 ms. Allocated memory is still 341.8 MB. Free memory was 325.9 MB in the beginning and 324.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-25 07:38:53,511 INFO L168 Benchmark]: Boogie Preprocessor took 20.93 ms. Allocated memory is still 341.8 MB. Free memory was 324.5 MB in the beginning and 323.7 MB in the end (delta: 828.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:38:53,511 INFO L168 Benchmark]: RCFGBuilder took 264.49 ms. Allocated memory is still 341.8 MB. Free memory was 323.4 MB in the beginning and 312.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-25 07:38:53,511 INFO L168 Benchmark]: TraceAbstraction took 1958.96 ms. Allocated memory is still 341.8 MB. Free memory was 312.0 MB in the beginning and 211.2 MB in the end (delta: 100.9 MB). Peak memory consumption was 103.1 MB. Max. memory is 16.0 GB. [2021-03-25 07:38:53,522 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 237.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 178.39 ms. Allocated memory was 255.9 MB in the beginning and 341.8 MB in the end (delta: 86.0 MB). Free memory was 235.0 MB in the beginning and 325.9 MB in the end (delta: -90.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.28 ms. Allocated memory is still 341.8 MB. Free memory was 325.9 MB in the beginning and 324.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.93 ms. Allocated memory is still 341.8 MB. Free memory was 324.5 MB in the beginning and 323.7 MB in the end (delta: 828.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 264.49 ms. Allocated memory is still 341.8 MB. Free memory was 323.4 MB in the beginning and 312.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1958.96 ms. Allocated memory is still 341.8 MB. Free memory was 312.0 MB in the beginning and 211.2 MB in the end (delta: 100.9 MB). Peak memory consumption was 103.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 377.4ms, 24 PlacesBefore, 11 PlacesAfterwards, 22 TransitionsBefore, 8 TransitionsAfterwards, 90 CoEnabledTransitionPairs, 5 FixpointIterations, 6 TrivialSequentialCompositions, 6 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 15 TotalNumberOfCompositions, 47 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 47, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 40, positive: 40, positive conditional: 0, positive unconditional: 40, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 40, positive: 40, positive conditional: 0, positive unconditional: 40, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 47, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 40, unknown conditional: 0, unknown unconditional: 40] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 22.8ms, 13 PlacesBefore, 12 PlacesAfterwards, 9 TransitionsBefore, 8 TransitionsAfterwards, 12 CoEnabledTransitionPairs, 2 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 1 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 49.8ms, 15 PlacesBefore, 13 PlacesAfterwards, 9 TransitionsBefore, 8 TransitionsAfterwards, 12 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 51.5ms, 15 PlacesBefore, 13 PlacesAfterwards, 9 TransitionsBefore, 8 TransitionsAfterwards, 12 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 30.1ms, 16 PlacesBefore, 16 PlacesAfterwards, 9 TransitionsBefore, 9 TransitionsAfterwards, 12 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 1, unknown conditional: 0, unknown unconditional: 1] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 22]: assertion can be violated assertion can be violated We found a FailurePath: [L26] 0 pthread_t thread; [L27] FCALL, FORK 0 pthread_create(&thread, NULL, worker_thread, NULL) VAL [arg={0:0}] [L18] 1 int x = 0; [L19] COND TRUE 1 x < 4 [L20] 1 x++ [L19] COND TRUE 1 x < 4 [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=2] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=2] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=3] [L19] COND TRUE 1 x < 4 VAL [arg={0:0}, arg={0:0}, x=3] [L20] 1 x++ VAL [arg={0:0}, arg={0:0}, x=4] [L19] COND FALSE 1 !(x < 4) [L22] 1 CodeAnnotStmt[Assertion] VAL [arg={0:0}, arg={0:0}, x=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1881.8ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 129.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 429.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 7 SDslu, 0 SDs, 0 SdLazy, 42 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.2ms SsaConstructionTime, 60.7ms SatisfiabilityAnalysisTime, 239.7ms InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 98 SizeOfPredicates, 0 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/18 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 proved your program to be incorrect! Received shutdown request...