./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:10:43,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:10:43,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:10:43,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:10:43,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:10:43,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:10:43,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:10:43,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:10:43,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:10:43,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:10:43,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:10:43,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:10:43,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:10:43,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:10:43,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:10:43,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:10:43,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:10:43,809 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:10:43,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:10:43,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:10:43,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:10:43,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:10:43,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:10:43,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:10:43,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:10:43,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:10:43,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:10:43,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:10:43,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:10:43,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:10:43,838 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:10:43,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:10:43,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:10:43,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:10:43,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:10:43,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:10:43,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:10:43,853 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:10:43,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:10:43,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:10:43,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:10:43,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:10:43,900 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:10:43,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:10:43,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:10:43,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:10:43,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:10:43,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:10:43,907 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:10:43,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:10:43,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:10:43,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:10:43,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:10:43,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:10:43,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:10:43,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:10:43,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:10:43,911 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:10:43,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:10:43,911 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:10:43,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:10:43,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:10:43,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:10:43,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:10:43,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:10:43,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:10:43,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:10:43,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:10:43,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:10:43,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:10:43,914 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:10:43,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:10:43,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:10:43,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:10:43,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 [2021-11-23 14:10:44,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:10:44,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:10:44,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:10:44,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:10:44,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:10:44,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-23 14:10:44,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/428ffeaec/675fba5fc92e43059c2e64ffc9ce78ae/FLAG39f7dcb08 [2021-11-23 14:10:45,058 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:10:45,058 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-23 14:10:45,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/428ffeaec/675fba5fc92e43059c2e64ffc9ce78ae/FLAG39f7dcb08 [2021-11-23 14:10:45,273 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/428ffeaec/675fba5fc92e43059c2e64ffc9ce78ae [2021-11-23 14:10:45,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:10:45,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:10:45,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:10:45,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:10:45,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:10:45,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:45,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1095f496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45, skipping insertion in model container [2021-11-23 14:10:45,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:45,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:10:45,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:10:45,792 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-23 14:10:45,798 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:10:45,809 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:10:45,908 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-23 14:10:45,909 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:10:45,959 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:10:45,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45 WrapperNode [2021-11-23 14:10:45,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:10:45,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:10:45,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:10:45,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:10:45,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,030 INFO L137 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-23 14:10:46,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:10:46,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:10:46,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:10:46,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:10:46,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:10:46,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:10:46,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:10:46,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:10:46,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (1/1) ... [2021-11-23 14:10:46,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:10:46,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:10:46,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:10:46,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:10:46,173 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-23 14:10:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-23 14:10:46,174 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-23 14:10:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-23 14:10:46,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 14:10:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 14:10:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:10:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 14:10:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 14:10:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:10:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 14:10:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:10:46,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:10:46,178 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 14:10:46,344 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:10:46,346 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:10:46,635 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:10:46,644 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:10:46,645 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 14:10:46,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:46 BoogieIcfgContainer [2021-11-23 14:10:46,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:10:46,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:10:46,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:10:46,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:10:46,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:45" (1/3) ... [2021-11-23 14:10:46,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a443eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:46, skipping insertion in model container [2021-11-23 14:10:46,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:45" (2/3) ... [2021-11-23 14:10:46,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a443eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:46, skipping insertion in model container [2021-11-23 14:10:46,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:46" (3/3) ... [2021-11-23 14:10:46,659 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2021-11-23 14:10:46,666 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 14:10:46,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:10:46,667 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:10:46,667 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 14:10:46,707 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,708 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,708 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,709 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,709 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,709 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,709 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,709 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,710 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,710 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,710 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,710 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,711 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,711 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,711 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,711 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,712 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,712 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,712 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,713 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,713 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,713 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,713 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,714 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,714 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,714 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,715 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,715 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,715 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,715 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,716 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,716 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,716 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,716 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,717 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,717 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,729 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,729 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,730 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,730 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,730 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,734 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,735 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,735 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,735 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,736 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:10:46,737 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-23 14:10:46,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:10:46,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:10:46,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 14:10:46,838 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-23 14:10:46,911 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-23 14:10:46,911 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:10:46,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2021-11-23 14:10:46,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2021-11-23 14:10:46,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2021-11-23 14:10:46,960 INFO L129 PetriNetUnfolder]: 7/85 cut-off events. [2021-11-23 14:10:46,960 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:10:46,960 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:46,961 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:46,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times [2021-11-23 14:10:46,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:46,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575782881] [2021-11-23 14:10:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:46,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:47,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:47,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575782881] [2021-11-23 14:10:47,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575782881] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:10:47,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:10:47,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:10:47,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332945894] [2021-11-23 14:10:47,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:10:47,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 14:10:47,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:10:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 14:10:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:10:47,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2021-11-23 14:10:47,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,343 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:10:47,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2021-11-23 14:10:47,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:10:47,427 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-23 14:10:47,427 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 14:10:47,429 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place. [2021-11-23 14:10:47,436 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2021-11-23 14:10:47,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2021-11-23 14:10:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 14:10:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-23 14:10:47,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2021-11-23 14:10:47,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-11-23 14:10:47,465 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2021-11-23 14:10:47,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2021-11-23 14:10:47,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:10:47,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2021-11-23 14:10:47,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,486 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,489 INFO L186 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2021-11-23 14:10:47,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2021-11-23 14:10:47,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-23 14:10:47,507 INFO L242 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2021-11-23 14:10:47,510 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2021-11-23 14:10:47,514 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2021-11-23 14:10:47,515 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2021-11-23 14:10:47,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:47,516 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:47,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:10:47,516 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:47,517 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times [2021-11-23 14:10:47,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:47,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382936810] [2021-11-23 14:10:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:47,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:47,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:47,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382936810] [2021-11-23 14:10:47,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382936810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:10:47,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:10:47,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 14:10:47,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302349652] [2021-11-23 14:10:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:10:47,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 14:10:47,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:10:47,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 14:10:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 14:10:47,710 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2021-11-23 14:10:47,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:10:47,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2021-11-23 14:10:47,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:10:47,770 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2021-11-23 14:10:47,770 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:10:47,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2021-11-23 14:10:47,773 INFO L132 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2021-11-23 14:10:47,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow [2021-11-23 14:10:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 14:10:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-23 14:10:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2021-11-23 14:10:47,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.90625 [2021-11-23 14:10:47,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2021-11-23 14:10:47,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2021-11-23 14:10:47,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:10:47,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2021-11-23 14:10:47,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,785 INFO L186 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions. [2021-11-23 14:10:47,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow [2021-11-23 14:10:47,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 14:10:47,790 INFO L242 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow [2021-11-23 14:10:47,791 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2021-11-23 14:10:47,792 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places. [2021-11-23 14:10:47,792 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow [2021-11-23 14:10:47,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:47,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:47,793 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:47,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:10:47,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times [2021-11-23 14:10:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487459266] [2021-11-23 14:10:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:47,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487459266] [2021-11-23 14:10:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487459266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:10:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905243889] [2021-11-23 14:10:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:47,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:10:47,944 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:10:47,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:10:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 14:10:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:10:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:48,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:10:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905243889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:10:48,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:10:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-23 14:10:48,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191866641] [2021-11-23 14:10:48,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:10:48,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 14:10:48,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:10:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 14:10:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-23 14:10:48,552 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-11-23 14:10:48,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:48,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:10:48,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-11-23 14:10:48,555 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:10:48,714 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2021-11-23 14:10:48,714 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-23 14:10:48,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place. [2021-11-23 14:10:48,718 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2021-11-23 14:10:48,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow [2021-11-23 14:10:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:10:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-23 14:10:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2021-11-23 14:10:48,731 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2021-11-23 14:10:48,732 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2021-11-23 14:10:48,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2021-11-23 14:10:48,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:10:48,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2021-11-23 14:10:48,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:48,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:48,745 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:48,745 INFO L186 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions. [2021-11-23 14:10:48,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow [2021-11-23 14:10:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-23 14:10:48,750 INFO L242 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow [2021-11-23 14:10:48,751 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96} [2021-11-23 14:10:48,752 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2021-11-23 14:10:48,752 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow [2021-11-23 14:10:48,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:48,753 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:48,754 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:48,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 14:10:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:48,977 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:48,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times [2021-11-23 14:10:48,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:48,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654025155] [2021-11-23 14:10:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:48,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:49,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:49,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654025155] [2021-11-23 14:10:49,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654025155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:10:49,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778487360] [2021-11-23 14:10:49,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:10:49,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:49,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:10:49,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:10:49,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:10:49,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:10:49,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:10:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 14:10:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:10:49,514 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:49,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:10:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:49,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778487360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:10:49,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:10:49,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2021-11-23 14:10:49,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432467843] [2021-11-23 14:10:49,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:10:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 14:10:49,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:10:49,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 14:10:49,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 14:10:49,787 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-11-23 14:10:49,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:49,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:10:49,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-11-23 14:10:49,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:10:50,067 INFO L129 PetriNetUnfolder]: 3/132 cut-off events. [2021-11-23 14:10:50,067 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-11-23 14:10:50,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2021-11-23 14:10:50,072 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2021-11-23 14:10:50,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow [2021-11-23 14:10:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 14:10:50,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-23 14:10:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2021-11-23 14:10:50,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2021-11-23 14:10:50,082 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2021-11-23 14:10:50,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2021-11-23 14:10:50,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:10:50,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2021-11-23 14:10:50,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:50,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:50,102 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:50,102 INFO L186 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions. [2021-11-23 14:10:50,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow [2021-11-23 14:10:50,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-11-23 14:10:50,117 INFO L242 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow [2021-11-23 14:10:50,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109} [2021-11-23 14:10:50,120 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2021-11-23 14:10:50,120 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow [2021-11-23 14:10:50,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:50,122 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:50,122 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:50,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:10:50,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:50,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times [2021-11-23 14:10:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752804898] [2021-11-23 14:10:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:50,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:50,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:50,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752804898] [2021-11-23 14:10:50,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752804898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:10:50,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129848618] [2021-11-23 14:10:50,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:10:50,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:50,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:10:50,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:10:50,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:10:50,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 14:10:50,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:10:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 14:10:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:10:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:51,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:10:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:51,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129848618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:10:51,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:10:51,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2021-11-23 14:10:51,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966117587] [2021-11-23 14:10:51,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:10:51,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 14:10:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:10:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 14:10:51,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-23 14:10:51,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-11-23 14:10:51,594 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 31 states, 31 states have (on average 83.06451612903226) internal successors, (2575), 31 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:51,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:10:51,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-11-23 14:10:51,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:10:52,322 INFO L129 PetriNetUnfolder]: 3/181 cut-off events. [2021-11-23 14:10:52,322 INFO L130 PetriNetUnfolder]: For 236/236 co-relation queries the response was YES. [2021-11-23 14:10:52,326 INFO L84 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 181 events. 3/181 cut-off events. For 236/236 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 7/185 useless extension candidates. Maximal degree in co-relation 415. Up to 25 conditions per place. [2021-11-23 14:10:52,327 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 21 selfloop transitions, 42 changer transitions 0/142 dead transitions. [2021-11-23 14:10:52,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 142 transitions, 748 flow [2021-11-23 14:10:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 14:10:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-23 14:10:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3472 transitions. [2021-11-23 14:10:52,345 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112 [2021-11-23 14:10:52,346 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3472 transitions. [2021-11-23 14:10:52,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3472 transitions. [2021-11-23 14:10:52,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:10:52,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3472 transitions. [2021-11-23 14:10:52,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 82.66666666666667) internal successors, (3472), 42 states have internal predecessors, (3472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:52,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 96.0) internal successors, (4128), 43 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:52,385 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 96.0) internal successors, (4128), 43 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:52,385 INFO L186 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 42 states and 3472 transitions. [2021-11-23 14:10:52,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 142 transitions, 748 flow [2021-11-23 14:10:52,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 142 transitions, 710 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-11-23 14:10:52,400 INFO L242 Difference]: Finished difference. Result has 172 places, 131 transitions, 614 flow [2021-11-23 14:10:52,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=614, PETRI_PLACES=172, PETRI_TRANSITIONS=131} [2021-11-23 14:10:52,402 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 78 predicate places. [2021-11-23 14:10:52,402 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 131 transitions, 614 flow [2021-11-23 14:10:52,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.06451612903226) internal successors, (2575), 31 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:10:52,404 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:10:52,405 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:10:52,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:10:52,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:52,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:10:52,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:10:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2049692625, now seen corresponding path program 4 times [2021-11-23 14:10:52,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:10:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869407389] [2021-11-23 14:10:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:10:52,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:10:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:10:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:10:54,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:10:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869407389] [2021-11-23 14:10:54,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869407389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:10:54,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118886322] [2021-11-23 14:10:54,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:10:54,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:10:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:10:54,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:10:54,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:10:55,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:10:55,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:10:55,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 14:10:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:11:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 486 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:00,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:18:53,108 WARN L227 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 14:21:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 649 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:21:16,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118886322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:21:16,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:21:16,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 139 [2021-11-23 14:21:16,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769363305] [2021-11-23 14:21:16,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:21:16,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2021-11-23 14:21:16,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:21:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-11-23 14:21:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=17792, Unknown=169, NotChecked=0, Total=19182 [2021-11-23 14:21:16,176 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 96 [2021-11-23 14:21:16,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 131 transitions, 614 flow. Second operand has 139 states, 139 states have (on average 69.23741007194245) internal successors, (9624), 139 states have internal predecessors, (9624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:16,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:21:16,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 96 [2021-11-23 14:21:16,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:23:24,304 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~i~0 (- 1))) (.cse15 (+ (* 2 c_~cur~0) c_~prev~0 3)) (.cse14 (* c_~j~0 (- 1))) (.cse1 (+ c_~prev~0 c_~cur~0 1))) (and (forall ((aux_div_v_~next~0_20_56 Int) (v_~cur~0_22 Int) (aux_mod_v_~next~0_20_56 Int)) (or (< v_~cur~0_22 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ aux_mod_v_~next~0_20_56 9 c_~i~0) (+ (* 2 v_~cur~0_22) c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (<= (+ (* 5 aux_div_v_~next~0_20_56) v_~cur~0_22) (+ 22 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))))) (<= (div (+ .cse0 c_~cur~0 (- 3)) (- 2)) .cse1) (<= 1 c_~cur~0) (forall ((v_~cur~0_28 Int)) (or (and (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse2 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse2 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse2 c_~cur~0 v_~cur~0_28 1)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (< v_~cur~0_26 (+ c_~cur~0 (* 2 v_~cur~0_28))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (< v_~prev~0_24 (+ c_~cur~0 v_~cur~0_28 v_~cur~0_26))))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse3 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse3 c_~cur~0 v_~cur~0_28 1)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< v_~cur~0_26 (+ c_~cur~0 (* 2 v_~cur~0_28))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (< v_~prev~0_24 (+ c_~cur~0 v_~cur~0_28 v_~cur~0_26)) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse3 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)))))) (< v_~cur~0_28 (+ c_~prev~0 c_~cur~0)))) (forall ((v_~cur~0_28 Int) (aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse4 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~cur~0_28 (+ (* 2 c_~cur~0) c_~prev~0)) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse4 c_~prev~0 c_~cur~0 v_~cur~0_28 1)) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_28 v_~cur~0_26)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (< v_~cur~0_26 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_28))) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse4 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))) (forall ((v_~cur~0_28 Int) (aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse5 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~cur~0_28 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse5 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)) (<= 2 aux_mod_v_~cur~0_22_51) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< aux_div_v_~cur~0_22_51 (+ .cse5 c_~prev~0 c_~cur~0 v_~cur~0_28 1)) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_28 v_~cur~0_26)) (< v_~cur~0_26 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_28))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))) (forall ((v_~j~0_8 Int)) (or (and (forall ((v_~cur~0_28 Int) (aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse6 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~cur~0_28 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse6 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)) (<= 2 aux_mod_v_~cur~0_22_51) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< aux_div_v_~cur~0_22_51 (+ .cse6 c_~prev~0 c_~cur~0 v_~cur~0_28 1)) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_28 v_~cur~0_26)) (< v_~cur~0_26 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_28))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))) (forall ((v_~cur~0_28 Int) (aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse7 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~cur~0_28 (+ (* 2 c_~cur~0) c_~prev~0)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 v_~j~0_8) (* 2 aux_mod_v_~next~0_20_56))) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse7 c_~prev~0 c_~cur~0 v_~cur~0_28 1)) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_28 v_~cur~0_26)) (< v_~cur~0_26 (+ c_~prev~0 c_~cur~0 (* 2 v_~cur~0_28))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (< (+ aux_mod_v_~next~0_20_56 (* 2 aux_mod_v_~cur~0_22_51) 11 v_~j~0_8) (+ (* 3 v_~prev~0_24) .cse7 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51) v_~cur~0_28)))))) (< 1 v_~j~0_8))) (forall ((aux_div_v_~next~0_20_56 Int) (aux_mod_v_~next~0_20_56 Int)) (or (<= (+ (* 5 aux_div_v_~next~0_20_56) c_~cur~0) (+ (* 2 c_~j~0) 22 (* 2 aux_mod_v_~next~0_20_56))) (< (+ aux_mod_v_~next~0_20_56 9 c_~j~0) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse8 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_26)) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse8 c_~prev~0 c_~cur~0 1)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< v_~cur~0_26 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~next~0_20_56 0) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse8 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51)))))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse9 (* 2 c_~cur~0))) (or (< aux_mod_v_~cur~0_22_51 0) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse9 c_~prev~0 1)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0)) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse9 c_~prev~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51)))))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (v_~cur~0_26 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse10 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0 v_~cur~0_26)) (<= 2 aux_mod_v_~cur~0_22_51) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse10 c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (< aux_div_v_~cur~0_22_51 (+ .cse10 c_~prev~0 c_~cur~0 1)) (<= 2 aux_mod_v_~next~0_20_56) (< v_~cur~0_26 (+ (* 2 c_~cur~0) c_~prev~0)) (< aux_mod_v_~next~0_20_56 0)))) (forall ((v_~prev~0_24 Int)) (or (< v_~prev~0_24 c_~cur~0) (and (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (aux_mod_v_~next~0_20_56 Int)) (or (< aux_mod_v_~cur~0_22_51 0) (<= 2 aux_mod_v_~cur~0_22_51) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_div_v_~cur~0_22_51 (+ c_~prev~0 c_~cur~0 1)) (< aux_mod_v_~next~0_20_56 0))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (aux_mod_v_~next~0_20_56 Int)) (or (< aux_mod_v_~cur~0_22_51 0) (<= 2 aux_mod_v_~cur~0_22_51) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_div_v_~cur~0_22_51 (+ c_~prev~0 c_~cur~0 1)) (< aux_mod_v_~next~0_20_56 0)))))) (<= 0 c_~prev~0) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse11 (* 2 c_~cur~0))) (or (< aux_mod_v_~cur~0_22_51 0) (<= 2 aux_mod_v_~cur~0_22_51) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< aux_div_v_~cur~0_22_51 (+ .cse11 c_~prev~0 1)) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse11 c_~prev~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (< v_~prev~0_24 (+ c_~prev~0 c_~cur~0)) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))) (= c_~cur~0 1) (forall ((v_~cur~0_22 Int)) (or (< v_~cur~0_22 (+ c_~prev~0 c_~cur~0)) (and (forall ((aux_div_v_~next~0_20_56 Int) (aux_mod_v_~next~0_20_56 Int)) (or (< (+ aux_mod_v_~next~0_20_56 9 c_~i~0) (+ (* 2 v_~cur~0_22) c_~cur~0 (* 2 aux_div_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (<= (+ (* 5 aux_div_v_~next~0_20_56) v_~cur~0_22) (+ 22 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))))) (forall ((aux_div_v_~next~0_20_56 Int) (aux_mod_v_~next~0_20_56 Int)) (or (<= (+ (* 5 aux_div_v_~next~0_20_56) v_~cur~0_22) (+ (* 2 c_~j~0) 22 (* 2 aux_mod_v_~next~0_20_56))) (< (+ aux_mod_v_~next~0_20_56 9 c_~j~0) (+ (* 2 v_~cur~0_22) c_~cur~0 (* 2 aux_div_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))))) (forall ((aux_div_v_~next~0_20_56 Int) (aux_mod_v_~next~0_20_56 Int)) (or (<= (+ (* 5 aux_div_v_~next~0_20_56) c_~cur~0) (+ 22 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0) (< (+ aux_mod_v_~next~0_20_56 9 c_~i~0) (+ (* 2 c_~cur~0) c_~prev~0 (* 2 aux_div_v_~next~0_20_56))))) (forall ((v_~cur~0_26 Int)) (or (< v_~cur~0_26 (+ c_~prev~0 c_~cur~0)) (and (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse12 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~prev~0_24 (+ c_~cur~0 v_~cur~0_26)) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse12 c_~cur~0 1)) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56) (* 2 c_~i~0))) (< (+ aux_mod_v_~next~0_20_56 c_~i~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse12 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0)))) (forall ((aux_mod_v_~cur~0_22_51 Int) (aux_div_v_~next~0_20_56 Int) (aux_div_v_~cur~0_22_51 Int) (v_~prev~0_24 Int) (aux_mod_v_~next~0_20_56 Int)) (let ((.cse13 (* 2 v_~cur~0_26))) (or (< aux_mod_v_~cur~0_22_51 0) (< v_~prev~0_24 (+ c_~cur~0 v_~cur~0_26)) (<= 2 aux_mod_v_~cur~0_22_51) (< aux_div_v_~cur~0_22_51 (+ .cse13 c_~cur~0 1)) (< (+ aux_mod_v_~next~0_20_56 c_~j~0 (* 2 aux_mod_v_~cur~0_22_51) 11) (+ (* 3 v_~prev~0_24) .cse13 c_~cur~0 (* 2 aux_div_v_~next~0_20_56) (* 4 aux_div_v_~cur~0_22_51))) (<= (+ (* 5 aux_div_v_~next~0_20_56) (* 2 aux_div_v_~cur~0_22_51) v_~prev~0_24) (+ 23 (* 2 c_~j~0) aux_mod_v_~cur~0_22_51 (* 2 aux_mod_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0))))))) (<= (div (+ .cse14 c_~prev~0 c_~cur~0 (- 7)) (- 2)) .cse15) (forall ((aux_div_v_~next~0_20_56 Int) (v_~cur~0_22 Int) (aux_mod_v_~next~0_20_56 Int)) (or (<= (+ (* 5 aux_div_v_~next~0_20_56) v_~cur~0_22) (+ (* 2 c_~j~0) 22 (* 2 aux_mod_v_~next~0_20_56))) (< v_~cur~0_22 (+ (* 2 c_~cur~0) c_~prev~0)) (< (+ aux_mod_v_~next~0_20_56 9 c_~j~0) (+ (* 2 v_~cur~0_22) c_~prev~0 c_~cur~0 (* 2 aux_div_v_~next~0_20_56))) (<= 2 aux_mod_v_~next~0_20_56) (< aux_mod_v_~next~0_20_56 0))) (<= (div (+ .cse0 c_~prev~0 c_~cur~0 (- 7)) (- 2)) .cse15) (<= (div (+ .cse14 c_~cur~0 (- 3)) (- 2)) .cse1))) is different from false [2021-11-23 14:23:43,284 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-23 14:23:43,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-23 14:23:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 14:23:43,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 14:23:43,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 14:23:43,511 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:829) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:483) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:452) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:433) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:171) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:197) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:212) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:137) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfoldingHelper(PetriNetUnfolder.java:208) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.computeUnfolding(PetriNetUnfolder.java:167) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:128) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:65) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:120) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:509) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:226) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 53 more [2021-11-23 14:23:43,519 INFO L158 Benchmark]: Toolchain (without parser) took 778238.24ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 50.3MB in the beginning and 94.0MB in the end (delta: -43.7MB). Peak memory consumption was 25.7MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,519 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 92.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 14:23:43,520 INFO L158 Benchmark]: CACSL2BoogieTranslator took 680.90ms. Allocated memory is still 92.3MB. Free memory was 50.0MB in the beginning and 59.3MB in the end (delta: -9.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.49ms. Allocated memory is still 92.3MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,521 INFO L158 Benchmark]: Boogie Preprocessor took 34.40ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 55.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,522 INFO L158 Benchmark]: RCFGBuilder took 581.80ms. Allocated memory is still 92.3MB. Free memory was 55.8MB in the beginning and 43.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,523 INFO L158 Benchmark]: TraceAbstraction took 776865.95ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 43.2MB in the beginning and 94.0MB in the end (delta: -50.8MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-11-23 14:23:43,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 92.3MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 680.90ms. Allocated memory is still 92.3MB. Free memory was 50.0MB in the beginning and 59.3MB in the end (delta: -9.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.49ms. Allocated memory is still 92.3MB. Free memory was 59.3MB in the beginning and 57.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.40ms. Allocated memory is still 92.3MB. Free memory was 57.2MB in the beginning and 55.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 581.80ms. Allocated memory is still 92.3MB. Free memory was 55.8MB in the beginning and 43.5MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 776865.95ms. Allocated memory was 92.3MB in the beginning and 161.5MB in the end (delta: 69.2MB). Free memory was 43.2MB in the beginning and 94.0MB in the end (delta: -50.8MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:23:46,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:23:46,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:23:46,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:23:46,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:23:46,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:23:46,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:23:46,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:23:46,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:23:46,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:23:46,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:23:46,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:23:46,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:23:46,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:23:46,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:23:46,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:23:46,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:23:46,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:23:46,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:23:46,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:23:46,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:23:46,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:23:46,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:23:46,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:23:46,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:23:46,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:23:46,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:23:46,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:23:46,448 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:23:46,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:23:46,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:23:46,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:23:46,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:23:46,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:23:46,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:23:46,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:23:46,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:23:46,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:23:46,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:23:46,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:23:46,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:23:46,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-23 14:23:46,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:23:46,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:23:46,501 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:23:46,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:23:46,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:23:46,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:23:46,506 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:23:46,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:23:46,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:23:46,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:23:46,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:23:46,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:23:46,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:23:46,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:23:46,510 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 14:23:46,510 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 14:23:46,510 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 14:23:46,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:23:46,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:23:46,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:23:46,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:23:46,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:23:46,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:23:46,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:23:46,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:23:46,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:23:46,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:23:46,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:23:46,514 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-23 14:23:46,514 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 14:23:46,514 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:23:46,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:23:46,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:23:46,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:23:46,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 14:23:46,516 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c475d56613186560380fd7710c1a393bef46e366024d2f60e26aa83cc625627 [2021-11-23 14:23:47,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:23:47,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:23:47,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:23:47,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:23:47,076 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:23:47,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-23 14:23:47,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/4fc8d4a76/71073a12b43547eca8a7f7a70feed035/FLAG6f5bd323b [2021-11-23 14:23:47,893 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:23:47,894 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i [2021-11-23 14:23:47,923 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/4fc8d4a76/71073a12b43547eca8a7f7a70feed035/FLAG6f5bd323b [2021-11-23 14:23:48,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/data/4fc8d4a76/71073a12b43547eca8a7f7a70feed035 [2021-11-23 14:23:48,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:23:48,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:23:48,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:23:48,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:23:48,125 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:23:48,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:48" (1/1) ... [2021-11-23 14:23:48,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d6989b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:48, skipping insertion in model container [2021-11-23 14:23:48,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:48" (1/1) ... [2021-11-23 14:23:48,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:23:48,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:23:48,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-23 14:23:48,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:23:48,880 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:23:48,961 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/sv-benchmarks/c/pthread/fib_unsafe-6.i[30811,30824] [2021-11-23 14:23:48,973 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:23:49,042 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:23:49,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49 WrapperNode [2021-11-23 14:23:49,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:23:49,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:23:49,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:23:49,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:23:49,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,143 INFO L137 Inliner]: procedures = 167, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-11-23 14:23:49,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:23:49,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:23:49,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:23:49,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:23:49,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:23:49,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:23:49,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:23:49,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:23:49,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (1/1) ... [2021-11-23 14:23:49,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:23:49,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:23:49,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:23:49,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:23:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-23 14:23:49,340 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-23 14:23:49,340 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-23 14:23:49,341 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-23 14:23:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 14:23:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:23:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 14:23:49,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 14:23:49,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 14:23:49,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 14:23:49,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 14:23:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:23:49,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:23:49,345 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 14:23:49,577 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:23:49,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:23:49,897 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:23:49,908 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:23:49,909 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 14:23:49,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:49 BoogieIcfgContainer [2021-11-23 14:23:49,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:23:49,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:23:49,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:23:49,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:23:49,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:48" (1/3) ... [2021-11-23 14:23:49,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58827b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:49, skipping insertion in model container [2021-11-23 14:23:49,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:49" (2/3) ... [2021-11-23 14:23:49,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58827b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:49, skipping insertion in model container [2021-11-23 14:23:49,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:49" (3/3) ... [2021-11-23 14:23:49,946 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2021-11-23 14:23:49,953 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 14:23:49,954 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:23:49,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:23:49,954 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 14:23:49,999 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:49,999 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,000 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,000 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,000 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,001 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,001 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,001 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,002 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,002 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,002 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,003 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,003 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,003 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,004 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,004 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,004 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,005 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,005 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,005 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,006 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,006 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,006 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,006 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,007 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,007 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,007 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,008 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,008 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,008 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,009 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,009 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,009 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,010 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,010 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,010 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,014 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,014 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,015 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,015 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,015 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,020 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,020 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,021 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,021 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,021 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:23:50,022 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-23 14:23:50,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:23:50,099 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:23:50,099 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 14:23:50,114 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow [2021-11-23 14:23:50,165 INFO L129 PetriNetUnfolder]: 7/94 cut-off events. [2021-11-23 14:23:50,165 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:23:50,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-11-23 14:23:50,170 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow [2021-11-23 14:23:50,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow [2021-11-23 14:23:50,210 INFO L129 PetriNetUnfolder]: 7/85 cut-off events. [2021-11-23 14:23:50,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:23:50,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:23:50,212 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:23:50,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:23:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:23:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2078106083, now seen corresponding path program 1 times [2021-11-23 14:23:50,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:23:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [538405339] [2021-11-23 14:23:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:23:50,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:23:50,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:23:50,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:23:50,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 14:23:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:23:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 14:23:50,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:50,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 14:23:50,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [538405339] [2021-11-23 14:23:50,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [538405339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 14:23:50,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:23:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 14:23:50,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157819028] [2021-11-23 14:23:50,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 14:23:50,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 14:23:50,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 14:23:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 14:23:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:23:50,897 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96 [2021-11-23 14:23:50,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:50,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:23:50,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96 [2021-11-23 14:23:50,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:23:50,996 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-23 14:23:51,001 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-23 14:23:51,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 62 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2021-11-23 14:23:51,007 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions. [2021-11-23 14:23:51,008 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow [2021-11-23 14:23:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 14:23:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-23 14:23:51,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions. [2021-11-23 14:23:51,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334 [2021-11-23 14:23:51,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions. [2021-11-23 14:23:51,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions. [2021-11-23 14:23:51,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:23:51,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions. [2021-11-23 14:23:51,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,063 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,066 INFO L186 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions. [2021-11-23 14:23:51,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow [2021-11-23 14:23:51,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-23 14:23:51,088 INFO L242 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow [2021-11-23 14:23:51,091 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2021-11-23 14:23:51,095 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places. [2021-11-23 14:23:51,095 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow [2021-11-23 14:23:51,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:23:51,097 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:23:51,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:23:51,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 14:23:51,299 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:23:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:23:51,300 INFO L85 PathProgramCache]: Analyzing trace with hash -335295748, now seen corresponding path program 1 times [2021-11-23 14:23:51,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:23:51,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120350008] [2021-11-23 14:23:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:23:51,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:23:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:23:51,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:23:51,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 14:23:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:23:51,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 14:23:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:51,764 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 14:23:51,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120350008] [2021-11-23 14:23:51,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120350008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 14:23:51,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:23:51,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 14:23:51,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534703539] [2021-11-23 14:23:51,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 14:23:51,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:23:51,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 14:23:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:23:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:23:51,790 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96 [2021-11-23 14:23:51,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:23:51,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96 [2021-11-23 14:23:51,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:23:51,878 INFO L129 PetriNetUnfolder]: 3/95 cut-off events. [2021-11-23 14:23:51,878 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:23:51,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2021-11-23 14:23:51,884 INFO L132 encePairwiseOnDemand]: 92/96 looper letters, 7 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2021-11-23 14:23:51,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 210 flow [2021-11-23 14:23:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:23:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-23 14:23:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 344 transitions. [2021-11-23 14:23:51,897 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8958333333333334 [2021-11-23 14:23:51,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 344 transitions. [2021-11-23 14:23:51,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 344 transitions. [2021-11-23 14:23:51,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:23:51,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 344 transitions. [2021-11-23 14:23:51,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,910 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,910 INFO L186 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 4 states and 344 transitions. [2021-11-23 14:23:51,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 210 flow [2021-11-23 14:23:51,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 14:23:51,917 INFO L242 Difference]: Finished difference. Result has 97 places, 91 transitions, 204 flow [2021-11-23 14:23:51,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=97, PETRI_TRANSITIONS=91} [2021-11-23 14:23:51,919 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 3 predicate places. [2021-11-23 14:23:51,921 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 91 transitions, 204 flow [2021-11-23 14:23:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:51,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:23:51,923 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:23:51,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:23:52,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 14:23:52,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:23:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:23:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2079289939, now seen corresponding path program 1 times [2021-11-23 14:23:52,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:23:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945905956] [2021-11-23 14:23:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:23:52,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:23:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:23:52,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:23:52,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 14:23:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:23:52,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 14:23:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:52,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 14:23:52,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945905956] [2021-11-23 14:23:52,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945905956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:23:52,666 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:23:52,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 14:23:52,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791966893] [2021-11-23 14:23:52,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:23:52,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 14:23:52,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 14:23:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 14:23:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 14:23:52,677 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-11-23 14:23:52,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 91 transitions, 204 flow. Second operand has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:52,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:23:52,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-11-23 14:23:52,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:23:52,859 INFO L129 PetriNetUnfolder]: 3/104 cut-off events. [2021-11-23 14:23:52,859 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-23 14:23:52,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 104 events. 3/104 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 141. Up to 6 conditions per place. [2021-11-23 14:23:52,862 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2021-11-23 14:23:52,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 265 flow [2021-11-23 14:23:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:23:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-23 14:23:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions. [2021-11-23 14:23:52,867 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556 [2021-11-23 14:23:52,867 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions. [2021-11-23 14:23:52,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions. [2021-11-23 14:23:52,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:23:52,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions. [2021-11-23 14:23:52,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:52,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:52,878 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:52,878 INFO L186 Difference]: Start difference. First operand has 97 places, 91 transitions, 204 flow. Second operand 9 states and 750 transitions. [2021-11-23 14:23:52,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 265 flow [2021-11-23 14:23:52,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 98 transitions, 265 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 14:23:52,884 INFO L242 Difference]: Finished difference. Result has 108 places, 97 transitions, 258 flow [2021-11-23 14:23:52,885 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=258, PETRI_PLACES=108, PETRI_TRANSITIONS=97} [2021-11-23 14:23:52,886 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 14 predicate places. [2021-11-23 14:23:52,886 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 97 transitions, 258 flow [2021-11-23 14:23:52,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.0) internal successors, (664), 8 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:52,887 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:23:52,888 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:23:52,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:23:53,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 14:23:53,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:23:53,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:23:53,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2004568781, now seen corresponding path program 2 times [2021-11-23 14:23:53,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:23:53,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122466781] [2021-11-23 14:23:53,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:23:53,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:23:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:23:53,118 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:23:53,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 14:23:53,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:23:53,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:23:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 14:23:53,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:54,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:56,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 14:23:56,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122466781] [2021-11-23 14:23:56,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122466781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:23:56,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:23:56,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-11-23 14:23:56,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240825975] [2021-11-23 14:23:56,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:23:56,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 14:23:56,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 14:23:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 14:23:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-11-23 14:23:56,429 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 96 [2021-11-23 14:23:56,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 97 transitions, 258 flow. Second operand has 28 states, 28 states have (on average 70.71428571428571) internal successors, (1980), 28 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:56,435 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:23:56,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 96 [2021-11-23 14:23:56,435 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:24:03,607 INFO L129 PetriNetUnfolder]: 400/1205 cut-off events. [2021-11-23 14:24:03,607 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2021-11-23 14:24:03,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 1205 events. 400/1205 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 6347 event pairs, 1 based on Foata normal form. 0/1147 useless extension candidates. Maximal degree in co-relation 2058. Up to 313 conditions per place. [2021-11-23 14:24:03,625 INFO L132 encePairwiseOnDemand]: 81/96 looper letters, 54 selfloop transitions, 130 changer transitions 20/271 dead transitions. [2021-11-23 14:24:03,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 271 transitions, 1000 flow [2021-11-23 14:24:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 14:24:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-11-23 14:24:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3649 transitions. [2021-11-23 14:24:03,641 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7602083333333334 [2021-11-23 14:24:03,642 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3649 transitions. [2021-11-23 14:24:03,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3649 transitions. [2021-11-23 14:24:03,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:24:03,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3649 transitions. [2021-11-23 14:24:03,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 72.98) internal successors, (3649), 50 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:03,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 96.0) internal successors, (4896), 51 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:03,680 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 96.0) internal successors, (4896), 51 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:03,680 INFO L186 Difference]: Start difference. First operand has 108 places, 97 transitions, 258 flow. Second operand 50 states and 3649 transitions. [2021-11-23 14:24:03,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 271 transitions, 1000 flow [2021-11-23 14:24:03,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 271 transitions, 998 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-23 14:24:03,697 INFO L242 Difference]: Finished difference. Result has 177 places, 230 transitions, 967 flow [2021-11-23 14:24:03,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=967, PETRI_PLACES=177, PETRI_TRANSITIONS=230} [2021-11-23 14:24:03,699 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 83 predicate places. [2021-11-23 14:24:03,700 INFO L470 AbstractCegarLoop]: Abstraction has has 177 places, 230 transitions, 967 flow [2021-11-23 14:24:03,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 70.71428571428571) internal successors, (1980), 28 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:03,702 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:24:03,702 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:24:03,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 14:24:03,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 14:24:03,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:24:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:24:03,923 INFO L85 PathProgramCache]: Analyzing trace with hash 482555370, now seen corresponding path program 1 times [2021-11-23 14:24:03,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:24:03,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663921999] [2021-11-23 14:24:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:24:03,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:24:03,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:24:03,926 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:24:03,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 14:24:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:24:04,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 14:24:04,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:24:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:24:04,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:24:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:24:04,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-23 14:24:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663921999] [2021-11-23 14:24:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663921999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:24:04,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 14:24:04,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-23 14:24:04,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234638747] [2021-11-23 14:24:04,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 14:24:04,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 14:24:04,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-23 14:24:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 14:24:04,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-23 14:24:04,709 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96 [2021-11-23 14:24:04,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 230 transitions, 967 flow. Second operand has 16 states, 16 states have (on average 83.0) internal successors, (1328), 16 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:04,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:24:04,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96 [2021-11-23 14:24:04,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:24:05,735 INFO L129 PetriNetUnfolder]: 269/904 cut-off events. [2021-11-23 14:24:05,735 INFO L130 PetriNetUnfolder]: For 1266/1268 co-relation queries the response was YES. [2021-11-23 14:24:05,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2262 conditions, 904 events. 269/904 cut-off events. For 1266/1268 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4415 event pairs, 0 based on Foata normal form. 27/893 useless extension candidates. Maximal degree in co-relation 2232. Up to 221 conditions per place. [2021-11-23 14:24:05,762 INFO L132 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/211 dead transitions. [2021-11-23 14:24:05,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 211 transitions, 948 flow [2021-11-23 14:24:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 14:24:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-23 14:24:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions. [2021-11-23 14:24:05,771 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381 [2021-11-23 14:24:05,771 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions. [2021-11-23 14:24:05,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions. [2021-11-23 14:24:05,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:24:05,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions. [2021-11-23 14:24:05,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:05,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:05,831 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:05,832 INFO L186 Difference]: Start difference. First operand has 177 places, 230 transitions, 967 flow. Second operand 21 states and 1740 transitions. [2021-11-23 14:24:05,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 211 transitions, 948 flow [2021-11-23 14:24:05,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 211 transitions, 912 flow, removed 15 selfloop flow, removed 14 redundant places. [2021-11-23 14:24:05,864 INFO L242 Difference]: Finished difference. Result has 164 places, 207 transitions, 876 flow [2021-11-23 14:24:05,864 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=876, PETRI_PLACES=164, PETRI_TRANSITIONS=207} [2021-11-23 14:24:05,869 INFO L334 CegarLoopForPetriNet]: 94 programPoint places, 70 predicate places. [2021-11-23 14:24:05,870 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 207 transitions, 876 flow [2021-11-23 14:24:05,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.0) internal successors, (1328), 16 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:24:05,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:24:05,871 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:24:05,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 14:24:06,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 [2021-11-23 14:24:06,087 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:24:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:24:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1738646259, now seen corresponding path program 3 times [2021-11-23 14:24:06,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-23 14:24:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333703356] [2021-11-23 14:24:06,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:24:06,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 14:24:06,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat [2021-11-23 14:24:06,092 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 14:24:06,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2daa3ebf-c143-4c07-bf1f-e2039a6bacf1/bin/uautomizer-wIGwrQj20G/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 14:24:06,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 14:24:06,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:24:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 14:24:06,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:24:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:24:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates...