./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3 --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 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:25:13,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:25:13,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:25:13,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:25:13,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:25:13,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:25:13,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:25:13,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:25:13,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:25:13,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:25:13,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:25:13,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:25:13,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:25:13,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:25:13,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:25:13,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:25:13,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:25:13,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:25:13,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:25:13,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:25:13,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:25:13,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:25:13,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:25:13,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:25:13,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:25:13,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:25:13,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:25:13,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:25:13,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:25:13,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:25:13,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:25:13,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:25:13,849 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:25:13,850 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:25:13,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:25:13,853 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:25:13,854 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:25:13,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:25:13,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:25:13,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:25:13,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:25:13,857 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:25:13,901 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:25:13,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:25:13,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:25:13,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:25:13,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:25:13,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:25:13,905 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:25:13,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:25:13,905 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:25:13,906 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:25:13,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:25:13,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:25:13,907 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:25:13,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:25:13,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:25:13,908 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:25:13,908 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:25:13,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:25:13,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:25:13,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:25:13,909 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:25:13,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:25:13,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:13,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:25:13,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:25:13,910 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:25:13,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:25:13,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:25:13,911 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:25:13,913 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:25:13,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:25:13,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:25:13,913 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_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2021-10-15 20:25:14,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:25:14,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:25:14,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:25:14,223 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:25:14,224 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:25:14,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-15 20:25:14,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/data/a3bd6ef10/101aeb1d32ec464294f536f11866cc7d/FLAG1d73631b7 [2021-10-15 20:25:14,835 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:25:14,836 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-15 20:25:14,852 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/data/a3bd6ef10/101aeb1d32ec464294f536f11866cc7d/FLAG1d73631b7 [2021-10-15 20:25:15,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/data/a3bd6ef10/101aeb1d32ec464294f536f11866cc7d [2021-10-15 20:25:15,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:25:15,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:25:15,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:15,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:25:15,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:25:15,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,182 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39d4a413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15, skipping insertion in model container [2021-10-15 20:25:15,182 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:25:15,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:25:15,500 WARN L228 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_c8ea301a-6760-4449-b934-311009a89aad/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-15 20:25:15,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:15,517 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:25:15,569 WARN L228 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_c8ea301a-6760-4449-b934-311009a89aad/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-15 20:25:15,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:25:15,586 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:25:15,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15 WrapperNode [2021-10-15 20:25:15,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:25:15,590 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:15,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:25:15,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:25:15,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,619 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:25:15,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:25:15,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:25:15,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:25:15,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:25:15,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:25:15,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:25:15,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:25:15,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (1/1) ... [2021-10-15 20:25:15,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:25:15,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:15,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:25:15,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:25:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:25:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:25:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:25:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:25:15,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:25:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:25:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:25:16,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:25:16,194 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-15 20:25:16,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:16 BoogieIcfgContainer [2021-10-15 20:25:16,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:25:16,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:25:16,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:25:16,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:25:16,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:25:15" (1/3) ... [2021-10-15 20:25:16,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564a9c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:16, skipping insertion in model container [2021-10-15 20:25:16,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:25:15" (2/3) ... [2021-10-15 20:25:16,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564a9c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:25:16, skipping insertion in model container [2021-10-15 20:25:16,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:16" (3/3) ... [2021-10-15 20:25:16,206 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2021-10-15 20:25:16,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:25:16,212 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 20:25:16,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:25:16,277 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, mConcurrency=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 [2021-10-15 20:25:16,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 20:25:16,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 30 places, 46 transitions, 92 flow [2021-10-15 20:25:16,316 INFO L129 PetriNetUnfolder]: 17/46 cut-off events. [2021-10-15 20:25:16,316 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:16,318 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 46 events. 17/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 40 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-10-15 20:25:16,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 46 transitions, 92 flow [2021-10-15 20:25:16,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 41 transitions, 82 flow [2021-10-15 20:25:16,334 INFO L129 PetriNetUnfolder]: 16/40 cut-off events. [2021-10-15 20:25:16,334 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:16,334 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:16,335 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:16,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash 783168764, now seen corresponding path program 1 times [2021-10-15 20:25:16,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:16,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413137325] [2021-10-15 20:25:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:16,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:16,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:16,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413137325] [2021-10-15 20:25:16,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413137325] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:16,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:25:16,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216424174] [2021-10-15 20:25:16,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:16,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:16,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:25:16,616 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:16,619 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 41 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:16,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:16,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:16,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:16,646 INFO L129 PetriNetUnfolder]: 11/38 cut-off events. [2021-10-15 20:25:16,647 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:25:16,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 38 events. 11/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 25 event pairs, 0 based on Foata normal form. 4/31 useless extension candidates. Maximal degree in co-relation 31. Up to 5 conditions per place. [2021-10-15 20:25:16,649 INFO L132 encePairwiseOnDemand]: 38/46 looper letters, 4 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2021-10-15 20:25:16,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 88 flow [2021-10-15 20:25:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 121 transitions. [2021-10-15 20:25:16,663 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8768115942028986 [2021-10-15 20:25:16,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 121 transitions. [2021-10-15 20:25:16,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 121 transitions. [2021-10-15 20:25:16,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:16,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 121 transitions. [2021-10-15 20:25:16,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:16,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:16,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:16,679 INFO L186 Difference]: Start difference. First operand has 26 places, 41 transitions, 82 flow. Second operand 3 states and 121 transitions. [2021-10-15 20:25:16,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 88 flow [2021-10-15 20:25:16,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:25:16,686 INFO L242 Difference]: Finished difference. Result has 29 places, 37 transitions, 84 flow [2021-10-15 20:25:16,689 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=37} [2021-10-15 20:25:16,690 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2021-10-15 20:25:16,690 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 37 transitions, 84 flow [2021-10-15 20:25:16,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:16,691 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:16,691 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:16,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:25:16,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:16,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:16,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1825120727, now seen corresponding path program 1 times [2021-10-15 20:25:16,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:16,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161504110] [2021-10-15 20:25:16,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:16,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:25:16,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:16,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161504110] [2021-10-15 20:25:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161504110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:16,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101670113] [2021-10-15 20:25:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:16,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:16,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:16,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:16,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:25:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 20:25:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101670113] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:16,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:16,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:25:16,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396978597] [2021-10-15 20:25:16,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:16,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:16,995 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:16,995 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 37 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:16,995 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:16,995 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:16,996 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:17,054 INFO L129 PetriNetUnfolder]: 11/47 cut-off events. [2021-10-15 20:25:17,059 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 20:25:17,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 47 events. 11/47 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 72. Up to 19 conditions per place. [2021-10-15 20:25:17,061 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 21 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2021-10-15 20:25:17,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 156 flow [2021-10-15 20:25:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2021-10-15 20:25:17,066 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2021-10-15 20:25:17,067 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2021-10-15 20:25:17,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2021-10-15 20:25:17,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:17,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2021-10-15 20:25:17,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:17,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:17,076 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:17,078 INFO L186 Difference]: Start difference. First operand has 29 places, 37 transitions, 84 flow. Second operand 3 states and 99 transitions. [2021-10-15 20:25:17,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 156 flow [2021-10-15 20:25:17,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:17,082 INFO L242 Difference]: Finished difference. Result has 31 places, 40 transitions, 124 flow [2021-10-15 20:25:17,087 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=31, PETRI_TRANSITIONS=40} [2021-10-15 20:25:17,087 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2021-10-15 20:25:17,088 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 40 transitions, 124 flow [2021-10-15 20:25:17,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:17,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:17,090 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] [2021-10-15 20:25:17,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:17,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:17,301 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash 910298866, now seen corresponding path program 1 times [2021-10-15 20:25:17,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:17,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677341921] [2021-10-15 20:25:17,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:17,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 20:25:17,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:17,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677341921] [2021-10-15 20:25:17,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677341921] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:17,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392975047] [2021-10-15 20:25:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:17,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:17,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:17,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:25:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:17,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:25:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:25:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392975047] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:17,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:17,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:25:17,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467394417] [2021-10-15 20:25:17,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:17,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:17,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:17,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:17,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 40 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:17,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:17,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:17,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:17,666 INFO L129 PetriNetUnfolder]: 11/49 cut-off events. [2021-10-15 20:25:17,666 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:25:17,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 49 events. 11/49 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 25 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 66. Up to 13 conditions per place. [2021-10-15 20:25:17,667 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 5 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2021-10-15 20:25:17,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 142 flow [2021-10-15 20:25:17,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2021-10-15 20:25:17,670 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8188405797101449 [2021-10-15 20:25:17,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 113 transitions. [2021-10-15 20:25:17,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 113 transitions. [2021-10-15 20:25:17,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:17,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 113 transitions. [2021-10-15 20:25:17,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:17,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:17,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:17,674 INFO L186 Difference]: Start difference. First operand has 31 places, 40 transitions, 124 flow. Second operand 3 states and 113 transitions. [2021-10-15 20:25:17,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 142 flow [2021-10-15 20:25:17,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 42 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:17,678 INFO L242 Difference]: Finished difference. Result has 33 places, 41 transitions, 130 flow [2021-10-15 20:25:17,678 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=33, PETRI_TRANSITIONS=41} [2021-10-15 20:25:17,678 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2021-10-15 20:25:17,679 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 41 transitions, 130 flow [2021-10-15 20:25:17,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:17,679 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:17,679 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] [2021-10-15 20:25:17,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:17,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:17,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 707297012, now seen corresponding path program 1 times [2021-10-15 20:25:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:17,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838680745] [2021-10-15 20:25:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:17,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:25:17,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838680745] [2021-10-15 20:25:17,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838680745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:17,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086561677] [2021-10-15 20:25:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:17,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:17,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:17,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:25:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 20:25:18,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086561677] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:18,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:18,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-10-15 20:25:18,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428651344] [2021-10-15 20:25:18,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:25:18,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:18,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:25:18,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:18,186 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 46 [2021-10-15 20:25:18,186 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 41 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,187 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:18,187 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 46 [2021-10-15 20:25:18,188 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:18,254 INFO L129 PetriNetUnfolder]: 17/78 cut-off events. [2021-10-15 20:25:18,254 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 20:25:18,255 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 78 events. 17/78 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 127. Up to 22 conditions per place. [2021-10-15 20:25:18,256 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 11 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2021-10-15 20:25:18,256 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 49 transitions, 196 flow [2021-10-15 20:25:18,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:25:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 20:25:18,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2021-10-15 20:25:18,279 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7753623188405797 [2021-10-15 20:25:18,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2021-10-15 20:25:18,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2021-10-15 20:25:18,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:18,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2021-10-15 20:25:18,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:18,281 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 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) [2021-10-15 20:25:18,282 INFO L186 Difference]: Start difference. First operand has 33 places, 41 transitions, 130 flow. Second operand 3 states and 107 transitions. [2021-10-15 20:25:18,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 49 transitions, 196 flow [2021-10-15 20:25:18,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:18,285 INFO L242 Difference]: Finished difference. Result has 36 places, 49 transitions, 212 flow [2021-10-15 20:25:18,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=36, PETRI_TRANSITIONS=49} [2021-10-15 20:25:18,286 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2021-10-15 20:25:18,286 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 49 transitions, 212 flow [2021-10-15 20:25:18,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,286 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:18,286 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] [2021-10-15 20:25:18,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:18,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:18,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-10-15 20:25:18,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:18,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851188054] [2021-10-15 20:25:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:18,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:25:18,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:18,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851188054] [2021-10-15 20:25:18,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851188054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:18,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239295062] [2021-10-15 20:25:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:18,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:18,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:18,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:18,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:25:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:18,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:18,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:25:18,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239295062] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:18,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:25:18,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-15 20:25:18,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979573376] [2021-10-15 20:25:18,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:25:18,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:18,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:25:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:18,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:18,748 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 49 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,748 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:18,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:18,749 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:18,773 INFO L129 PetriNetUnfolder]: 17/80 cut-off events. [2021-10-15 20:25:18,774 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-10-15 20:25:18,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 80 events. 17/80 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 134. Up to 22 conditions per place. [2021-10-15 20:25:18,775 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 5 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2021-10-15 20:25:18,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 52 transitions, 236 flow [2021-10-15 20:25:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2021-10-15 20:25:18,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8315217391304348 [2021-10-15 20:25:18,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2021-10-15 20:25:18,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2021-10-15 20:25:18,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:18,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2021-10-15 20:25:18,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,781 INFO L186 Difference]: Start difference. First operand has 36 places, 49 transitions, 212 flow. Second operand 4 states and 153 transitions. [2021-10-15 20:25:18,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 52 transitions, 236 flow [2021-10-15 20:25:18,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:18,786 INFO L242 Difference]: Finished difference. Result has 38 places, 50 transitions, 210 flow [2021-10-15 20:25:18,786 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=38, PETRI_TRANSITIONS=50} [2021-10-15 20:25:18,786 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2021-10-15 20:25:18,786 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 50 transitions, 210 flow [2021-10-15 20:25:18,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:18,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:18,787 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:18,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:18,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:18,997 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:18,997 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-10-15 20:25:18,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:18,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172038768] [2021-10-15 20:25:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:18,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:25:19,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:19,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172038768] [2021-10-15 20:25:19,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172038768] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:19,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045018055] [2021-10-15 20:25:19,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:19,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:19,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:19,046 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:19,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:25:19,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-15 20:25:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:25:19,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:25:19,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045018055] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:19,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:19,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-10-15 20:25:19,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177826034] [2021-10-15 20:25:19,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:25:19,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:25:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:19,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2021-10-15 20:25:19,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 50 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:19,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:19,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2021-10-15 20:25:19,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:19,633 INFO L129 PetriNetUnfolder]: 30/152 cut-off events. [2021-10-15 20:25:19,633 INFO L130 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2021-10-15 20:25:19,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 152 events. 30/152 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 384 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 292. Up to 43 conditions per place. [2021-10-15 20:25:19,634 INFO L132 encePairwiseOnDemand]: 38/46 looper letters, 24 selfloop transitions, 14 changer transitions 3/73 dead transitions. [2021-10-15 20:25:19,635 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 73 transitions, 370 flow [2021-10-15 20:25:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:25:19,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:25:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2021-10-15 20:25:19,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2021-10-15 20:25:19,638 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 244 transitions. [2021-10-15 20:25:19,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 244 transitions. [2021-10-15 20:25:19,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:19,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 244 transitions. [2021-10-15 20:25:19,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 30.5) internal successors, (244), 8 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:19,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:19,647 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:19,647 INFO L186 Difference]: Start difference. First operand has 38 places, 50 transitions, 210 flow. Second operand 8 states and 244 transitions. [2021-10-15 20:25:19,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 73 transitions, 370 flow [2021-10-15 20:25:19,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 73 transitions, 364 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:19,653 INFO L242 Difference]: Finished difference. Result has 46 places, 56 transitions, 271 flow [2021-10-15 20:25:19,653 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=46, PETRI_TRANSITIONS=56} [2021-10-15 20:25:19,654 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2021-10-15 20:25:19,654 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 56 transitions, 271 flow [2021-10-15 20:25:19,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.25) internal successors, (218), 8 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:19,655 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:19,655 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:19,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:19,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:19,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1142029136, now seen corresponding path program 1 times [2021-10-15 20:25:19,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:19,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37355230] [2021-10-15 20:25:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:19,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-15 20:25:19,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:19,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37355230] [2021-10-15 20:25:19,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37355230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:19,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171377538] [2021-10-15 20:25:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:19,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:19,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:19,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:25:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:25:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-15 20:25:20,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171377538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:20,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:25:20,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-15 20:25:20,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404474491] [2021-10-15 20:25:20,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:25:20,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:25:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:20,160 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2021-10-15 20:25:20,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 56 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:20,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2021-10-15 20:25:20,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:20,279 INFO L129 PetriNetUnfolder]: 29/169 cut-off events. [2021-10-15 20:25:20,280 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-10-15 20:25:20,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 169 events. 29/169 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 394 event pairs, 0 based on Foata normal form. 13/182 useless extension candidates. Maximal degree in co-relation 412. Up to 71 conditions per place. [2021-10-15 20:25:20,282 INFO L132 encePairwiseOnDemand]: 31/46 looper letters, 36 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2021-10-15 20:25:20,282 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 423 flow [2021-10-15 20:25:20,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:25:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:25:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2021-10-15 20:25:20,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5559006211180124 [2021-10-15 20:25:20,284 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 179 transitions. [2021-10-15 20:25:20,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 179 transitions. [2021-10-15 20:25:20,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:20,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 179 transitions. [2021-10-15 20:25:20,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,288 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,288 INFO L186 Difference]: Start difference. First operand has 46 places, 56 transitions, 271 flow. Second operand 7 states and 179 transitions. [2021-10-15 20:25:20,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 423 flow [2021-10-15 20:25:20,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 411 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:20,295 INFO L242 Difference]: Finished difference. Result has 51 places, 60 transitions, 339 flow [2021-10-15 20:25:20,295 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2021-10-15 20:25:20,295 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 25 predicate places. [2021-10-15 20:25:20,296 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 339 flow [2021-10-15 20:25:20,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,296 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:20,296 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:20,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:20,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 20:25:20,521 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1376014835, now seen corresponding path program 2 times [2021-10-15 20:25:20,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:20,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879553432] [2021-10-15 20:25:20,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:20,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:20,546 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:20,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892031040] [2021-10-15 20:25:20,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:20,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:20,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:20,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:20,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:25:20,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:25:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:25:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-15 20:25:20,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:20,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879553432] [2021-10-15 20:25:20,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:20,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892031040] [2021-10-15 20:25:20,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892031040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:20,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:20,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:25:20,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547783312] [2021-10-15 20:25:20,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:20,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:20,817 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:20,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:20,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:20,818 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:20,861 INFO L129 PetriNetUnfolder]: 29/171 cut-off events. [2021-10-15 20:25:20,861 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-10-15 20:25:20,862 INFO L84 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 171 events. 29/171 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 393 event pairs, 0 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 334. Up to 49 conditions per place. [2021-10-15 20:25:20,863 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 7 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2021-10-15 20:25:20,863 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 65 transitions, 379 flow [2021-10-15 20:25:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:20,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 229 transitions. [2021-10-15 20:25:20,865 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8297101449275363 [2021-10-15 20:25:20,865 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 229 transitions. [2021-10-15 20:25:20,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 229 transitions. [2021-10-15 20:25:20,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:20,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 229 transitions. [2021-10-15 20:25:20,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 38.166666666666664) internal successors, (229), 6 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,868 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,868 INFO L186 Difference]: Start difference. First operand has 51 places, 60 transitions, 339 flow. Second operand 6 states and 229 transitions. [2021-10-15 20:25:20,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 65 transitions, 379 flow [2021-10-15 20:25:20,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 345 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:20,873 INFO L242 Difference]: Finished difference. Result has 53 places, 61 transitions, 329 flow [2021-10-15 20:25:20,874 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2021-10-15 20:25:20,874 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2021-10-15 20:25:20,874 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 329 flow [2021-10-15 20:25:20,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:20,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:20,875 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:20,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:21,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 20:25:21,097 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:21,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1811058575, now seen corresponding path program 3 times [2021-10-15 20:25:21,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:21,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996626493] [2021-10-15 20:25:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:21,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:21,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:21,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796201982] [2021-10-15 20:25:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:25:21,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:21,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:21,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:25:21,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 20:25:21,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:21,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-10-15 20:25:21,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996626493] [2021-10-15 20:25:21,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:21,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796201982] [2021-10-15 20:25:21,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796201982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:21,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:21,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 20:25:21,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722720584] [2021-10-15 20:25:21,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:21,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:21,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:21,393 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:21,394 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:21,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:21,394 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:21,450 INFO L129 PetriNetUnfolder]: 29/179 cut-off events. [2021-10-15 20:25:21,450 INFO L130 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2021-10-15 20:25:21,454 INFO L84 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 179 events. 29/179 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 415 event pairs, 0 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 370. Up to 43 conditions per place. [2021-10-15 20:25:21,455 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 6 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2021-10-15 20:25:21,455 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 357 flow [2021-10-15 20:25:21,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2021-10-15 20:25:21,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8152173913043478 [2021-10-15 20:25:21,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 150 transitions. [2021-10-15 20:25:21,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 150 transitions. [2021-10-15 20:25:21,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:21,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 150 transitions. [2021-10-15 20:25:21,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,460 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,460 INFO L186 Difference]: Start difference. First operand has 53 places, 61 transitions, 329 flow. Second operand 4 states and 150 transitions. [2021-10-15 20:25:21,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 357 flow [2021-10-15 20:25:21,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 343 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:21,466 INFO L242 Difference]: Finished difference. Result has 53 places, 62 transitions, 333 flow [2021-10-15 20:25:21,466 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2021-10-15 20:25:21,466 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2021-10-15 20:25:21,467 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 333 flow [2021-10-15 20:25:21,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,467 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:21,467 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:21,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:21,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:21,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2118348275, now seen corresponding path program 4 times [2021-10-15 20:25:21,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:21,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753810674] [2021-10-15 20:25:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:21,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:21,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:21,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018226040] [2021-10-15 20:25:21,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:25:21,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:21,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:21,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:25:21,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:25:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:25:21,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 20:25:21,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:21,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753810674] [2021-10-15 20:25:21,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:21,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018226040] [2021-10-15 20:25:21,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018226040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:21,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:21,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:25:21,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438241537] [2021-10-15 20:25:21,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:25:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:25:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:21,998 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:21,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:21,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:21,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:21,999 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:22,115 INFO L129 PetriNetUnfolder]: 29/197 cut-off events. [2021-10-15 20:25:22,115 INFO L130 PetriNetUnfolder]: For 137/137 co-relation queries the response was YES. [2021-10-15 20:25:22,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 197 events. 29/197 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 443 event pairs, 0 based on Foata normal form. 12/209 useless extension candidates. Maximal degree in co-relation 502. Up to 67 conditions per place. [2021-10-15 20:25:22,117 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 36 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2021-10-15 20:25:22,118 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 489 flow [2021-10-15 20:25:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:25:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:25:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-10-15 20:25:22,120 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-10-15 20:25:22,120 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-10-15 20:25:22,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-10-15 20:25:22,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:22,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-10-15 20:25:22,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,123 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,123 INFO L186 Difference]: Start difference. First operand has 53 places, 62 transitions, 333 flow. Second operand 5 states and 161 transitions. [2021-10-15 20:25:22,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 489 flow [2021-10-15 20:25:22,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 481 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:22,131 INFO L242 Difference]: Finished difference. Result has 56 places, 65 transitions, 397 flow [2021-10-15 20:25:22,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=397, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2021-10-15 20:25:22,132 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2021-10-15 20:25:22,133 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 397 flow [2021-10-15 20:25:22,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:22,133 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:22,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:25:22,355 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:22,356 INFO L82 PathProgramCache]: Analyzing trace with hash -844345202, now seen corresponding path program 5 times [2021-10-15 20:25:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:22,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690549204] [2021-10-15 20:25:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:22,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:22,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:22,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086573447] [2021-10-15 20:25:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:25:22,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:22,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:22,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:25:22,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 20:25:22,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:25:22,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-10-15 20:25:22,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:22,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690549204] [2021-10-15 20:25:22,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:22,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086573447] [2021-10-15 20:25:22,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086573447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:22,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:22,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:25:22,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129787554] [2021-10-15 20:25:22,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:22,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:22,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:22,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:22,721 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:22,721 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 397 flow. Second operand has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:22,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:22,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:22,829 INFO L129 PetriNetUnfolder]: 29/215 cut-off events. [2021-10-15 20:25:22,829 INFO L130 PetriNetUnfolder]: For 245/245 co-relation queries the response was YES. [2021-10-15 20:25:22,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 649 conditions, 215 events. 29/215 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 467 event pairs, 0 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 605. Up to 67 conditions per place. [2021-10-15 20:25:22,831 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 42 selfloop transitions, 18 changer transitions 0/92 dead transitions. [2021-10-15 20:25:22,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 589 flow [2021-10-15 20:25:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:22,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2021-10-15 20:25:22,839 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 20:25:22,839 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 192 transitions. [2021-10-15 20:25:22,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 192 transitions. [2021-10-15 20:25:22,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:22,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 192 transitions. [2021-10-15 20:25:22,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,846 INFO L186 Difference]: Start difference. First operand has 56 places, 65 transitions, 397 flow. Second operand 6 states and 192 transitions. [2021-10-15 20:25:22,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 589 flow [2021-10-15 20:25:22,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 553 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-10-15 20:25:22,857 INFO L242 Difference]: Finished difference. Result has 59 places, 68 transitions, 445 flow [2021-10-15 20:25:22,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=445, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2021-10-15 20:25:22,858 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2021-10-15 20:25:22,858 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 445 flow [2021-10-15 20:25:22,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.0) internal successors, (156), 6 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:22,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:22,859 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:22,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:23,073 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:23,073 INFO L82 PathProgramCache]: Analyzing trace with hash -2020829395, now seen corresponding path program 6 times [2021-10-15 20:25:23,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:23,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143732827] [2021-10-15 20:25:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:23,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:23,091 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:23,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613418883] [2021-10-15 20:25:23,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:25:23,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:23,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:23,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:25:23,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-15 20:25:23,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:23,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:25:23,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-15 20:25:23,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:23,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143732827] [2021-10-15 20:25:23,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:23,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613418883] [2021-10-15 20:25:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613418883] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:25:23,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:25:23,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:25:23,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297642659] [2021-10-15 20:25:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:25:23,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:25:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:25:23,441 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:23,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 445 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:23,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:23,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:23,442 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:23,549 INFO L129 PetriNetUnfolder]: 30/234 cut-off events. [2021-10-15 20:25:23,549 INFO L130 PetriNetUnfolder]: For 320/320 co-relation queries the response was YES. [2021-10-15 20:25:23,550 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 234 events. 30/234 cut-off events. For 320/320 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 553 event pairs, 0 based on Foata normal form. 12/246 useless extension candidates. Maximal degree in co-relation 710. Up to 78 conditions per place. [2021-10-15 20:25:23,551 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 27 selfloop transitions, 30 changer transitions 0/84 dead transitions. [2021-10-15 20:25:23,551 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 629 flow [2021-10-15 20:25:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:25:23,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:25:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2021-10-15 20:25:23,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2021-10-15 20:25:23,553 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2021-10-15 20:25:23,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2021-10-15 20:25:23,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:23,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2021-10-15 20:25:23,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:23,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:23,556 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:23,556 INFO L186 Difference]: Start difference. First operand has 59 places, 68 transitions, 445 flow. Second operand 4 states and 130 transitions. [2021-10-15 20:25:23,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 629 flow [2021-10-15 20:25:23,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 84 transitions, 575 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:23,563 INFO L242 Difference]: Finished difference. Result has 59 places, 75 transitions, 530 flow [2021-10-15 20:25:23,564 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=530, PETRI_PLACES=59, PETRI_TRANSITIONS=75} [2021-10-15 20:25:23,565 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2021-10-15 20:25:23,565 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 75 transitions, 530 flow [2021-10-15 20:25:23,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:23,566 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:23,566 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:23,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:23,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:23,780 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1679778486, now seen corresponding path program 1 times [2021-10-15 20:25:23,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:23,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717090984] [2021-10-15 20:25:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:23,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-10-15 20:25:23,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:23,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717090984] [2021-10-15 20:25:23,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717090984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:23,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267936164] [2021-10-15 20:25:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:23,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:23,840 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:23,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:25:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:24,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:25:24,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-15 20:25:24,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267936164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:24,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:25:24,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2021-10-15 20:25:24,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382769192] [2021-10-15 20:25:24,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:24,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:24,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:24,240 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2021-10-15 20:25:24,241 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 75 transitions, 530 flow. Second operand has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:24,241 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:24,241 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2021-10-15 20:25:24,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:24,330 INFO L129 PetriNetUnfolder]: 14/110 cut-off events. [2021-10-15 20:25:24,330 INFO L130 PetriNetUnfolder]: For 187/187 co-relation queries the response was YES. [2021-10-15 20:25:24,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 110 events. 14/110 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 4/114 useless extension candidates. Maximal degree in co-relation 351. Up to 28 conditions per place. [2021-10-15 20:25:24,332 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 14 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2021-10-15 20:25:24,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 539 flow [2021-10-15 20:25:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:25:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:25:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 246 transitions. [2021-10-15 20:25:24,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2021-10-15 20:25:24,335 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 246 transitions. [2021-10-15 20:25:24,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 246 transitions. [2021-10-15 20:25:24,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:24,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 246 transitions. [2021-10-15 20:25:24,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:24,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:24,338 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:24,338 INFO L186 Difference]: Start difference. First operand has 59 places, 75 transitions, 530 flow. Second operand 9 states and 246 transitions. [2021-10-15 20:25:24,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 539 flow [2021-10-15 20:25:24,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 537 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 20:25:24,345 INFO L242 Difference]: Finished difference. Result has 62 places, 67 transitions, 505 flow [2021-10-15 20:25:24,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=505, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2021-10-15 20:25:24,345 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2021-10-15 20:25:24,346 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 505 flow [2021-10-15 20:25:24,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.88888888888889) internal successors, (242), 9 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:24,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:24,346 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:24,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:24,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:25:24,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:24,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:24,562 INFO L82 PathProgramCache]: Analyzing trace with hash 317432636, now seen corresponding path program 1 times [2021-10-15 20:25:24,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:24,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805546196] [2021-10-15 20:25:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:24,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:24,578 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:24,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228003125] [2021-10-15 20:25:24,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:24,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:24,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:24,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:25:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:25:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-15 20:25:25,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:25,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805546196] [2021-10-15 20:25:25,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:25,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228003125] [2021-10-15 20:25:25,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228003125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:25,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:25,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:25:25,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924856599] [2021-10-15 20:25:25,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:25:25,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:25,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:25:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:25:25,017 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:25,017 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 505 flow. Second operand has 8 states, 8 states have (on average 37.5) internal successors, (300), 8 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,017 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:25,017 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:25,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:25,062 INFO L129 PetriNetUnfolder]: 14/112 cut-off events. [2021-10-15 20:25:25,062 INFO L130 PetriNetUnfolder]: For 197/197 co-relation queries the response was YES. [2021-10-15 20:25:25,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 112 events. 14/112 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 359. Up to 28 conditions per place. [2021-10-15 20:25:25,064 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 9 selfloop transitions, 7 changer transitions 0/74 dead transitions. [2021-10-15 20:25:25,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 561 flow [2021-10-15 20:25:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:25:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:25:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 305 transitions. [2021-10-15 20:25:25,066 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8288043478260869 [2021-10-15 20:25:25,066 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 305 transitions. [2021-10-15 20:25:25,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 305 transitions. [2021-10-15 20:25:25,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:25,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 305 transitions. [2021-10-15 20:25:25,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.125) internal successors, (305), 8 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,070 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,071 INFO L186 Difference]: Start difference. First operand has 62 places, 67 transitions, 505 flow. Second operand 8 states and 305 transitions. [2021-10-15 20:25:25,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 561 flow [2021-10-15 20:25:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 74 transitions, 531 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-10-15 20:25:25,077 INFO L242 Difference]: Finished difference. Result has 63 places, 68 transitions, 507 flow [2021-10-15 20:25:25,077 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=507, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2021-10-15 20:25:25,077 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2021-10-15 20:25:25,078 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 507 flow [2021-10-15 20:25:25,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.5) internal successors, (300), 8 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,078 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:25,078 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:25,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:25,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 20:25:25,299 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1265076930, now seen corresponding path program 2 times [2021-10-15 20:25:25,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:25,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049909430] [2021-10-15 20:25:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:25,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:25,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:25,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948209079] [2021-10-15 20:25:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:25,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:25,332 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:25,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 20:25:25,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:25:25,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:25:25,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-10-15 20:25:25,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:25,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049909430] [2021-10-15 20:25:25,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:25,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948209079] [2021-10-15 20:25:25,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948209079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:25,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:25,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:25:25,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147861235] [2021-10-15 20:25:25,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:25,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:25,768 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:25,769 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 507 flow. Second operand has 9 states, 9 states have (on average 37.55555555555556) internal successors, (338), 9 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:25,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:25,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:25,813 INFO L129 PetriNetUnfolder]: 14/114 cut-off events. [2021-10-15 20:25:25,813 INFO L130 PetriNetUnfolder]: For 191/191 co-relation queries the response was YES. [2021-10-15 20:25:25,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 114 events. 14/114 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 364. Up to 28 conditions per place. [2021-10-15 20:25:25,815 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 10 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2021-10-15 20:25:25,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 571 flow [2021-10-15 20:25:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:25:25,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:25:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 343 transitions. [2021-10-15 20:25:25,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285024154589372 [2021-10-15 20:25:25,817 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 343 transitions. [2021-10-15 20:25:25,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 343 transitions. [2021-10-15 20:25:25,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:25,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 343 transitions. [2021-10-15 20:25:25,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 38.111111111111114) internal successors, (343), 9 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,821 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,822 INFO L186 Difference]: Start difference. First operand has 63 places, 68 transitions, 507 flow. Second operand 9 states and 343 transitions. [2021-10-15 20:25:25,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 571 flow [2021-10-15 20:25:25,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 549 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 20:25:25,829 INFO L242 Difference]: Finished difference. Result has 66 places, 69 transitions, 521 flow [2021-10-15 20:25:25,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=521, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2021-10-15 20:25:25,830 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 40 predicate places. [2021-10-15 20:25:25,830 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 521 flow [2021-10-15 20:25:25,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 37.55555555555556) internal successors, (338), 9 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:25,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:25,831 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:25,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:26,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 20:25:26,044 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1638347072, now seen corresponding path program 3 times [2021-10-15 20:25:26,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:26,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102209356] [2021-10-15 20:25:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:26,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:26,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:26,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850224647] [2021-10-15 20:25:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:25:26,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:26,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:26,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:26,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 20:25:26,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:25:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:26,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:25:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-15 20:25:26,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:26,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102209356] [2021-10-15 20:25:26,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:26,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850224647] [2021-10-15 20:25:26,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850224647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:26,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:26,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:25:26,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008417145] [2021-10-15 20:25:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:25:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:25:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:26,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:26,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:26,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:26,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:26,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:26,945 INFO L129 PetriNetUnfolder]: 14/116 cut-off events. [2021-10-15 20:25:26,945 INFO L130 PetriNetUnfolder]: For 193/193 co-relation queries the response was YES. [2021-10-15 20:25:26,946 INFO L84 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 116 events. 14/116 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 52 event pairs, 0 based on Foata normal form. 1/117 useless extension candidates. Maximal degree in co-relation 361. Up to 28 conditions per place. [2021-10-15 20:25:26,946 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 7 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2021-10-15 20:25:26,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 555 flow [2021-10-15 20:25:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:25:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:25:26,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2021-10-15 20:25:26,949 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8130434782608695 [2021-10-15 20:25:26,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 187 transitions. [2021-10-15 20:25:26,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 187 transitions. [2021-10-15 20:25:26,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:26,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 187 transitions. [2021-10-15 20:25:26,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:26,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:26,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:26,953 INFO L186 Difference]: Start difference. First operand has 66 places, 69 transitions, 521 flow. Second operand 5 states and 187 transitions. [2021-10-15 20:25:26,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 555 flow [2021-10-15 20:25:26,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 529 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-10-15 20:25:26,959 INFO L242 Difference]: Finished difference. Result has 64 places, 70 transitions, 515 flow [2021-10-15 20:25:26,960 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2021-10-15 20:25:26,961 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 38 predicate places. [2021-10-15 20:25:26,961 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 515 flow [2021-10-15 20:25:26,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:26,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:26,962 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:27,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:27,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:27,188 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 44007490, now seen corresponding path program 4 times [2021-10-15 20:25:27,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:27,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067906329] [2021-10-15 20:25:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:27,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:27,212 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:27,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112880268] [2021-10-15 20:25:27,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:25:27,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:27,214 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:27,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 20:25:27,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:25:27,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:27,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:25:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-10-15 20:25:27,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:27,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067906329] [2021-10-15 20:25:27,657 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:27,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112880268] [2021-10-15 20:25:27,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112880268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:27,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:27,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:25:27,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160024566] [2021-10-15 20:25:27,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:25:27,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:25:27,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:27,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:27,660 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 515 flow. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,660 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:27,660 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:27,660 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:27,770 INFO L129 PetriNetUnfolder]: 14/125 cut-off events. [2021-10-15 20:25:27,770 INFO L130 PetriNetUnfolder]: For 238/238 co-relation queries the response was YES. [2021-10-15 20:25:27,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 125 events. 14/125 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 3/128 useless extension candidates. Maximal degree in co-relation 464. Up to 46 conditions per place. [2021-10-15 20:25:27,772 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 57 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2021-10-15 20:25:27,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 794 flow [2021-10-15 20:25:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:25:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:25:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 220 transitions. [2021-10-15 20:25:27,774 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6832298136645962 [2021-10-15 20:25:27,774 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 220 transitions. [2021-10-15 20:25:27,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 220 transitions. [2021-10-15 20:25:27,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:27,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 220 transitions. [2021-10-15 20:25:27,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,778 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,778 INFO L186 Difference]: Start difference. First operand has 64 places, 70 transitions, 515 flow. Second operand 7 states and 220 transitions. [2021-10-15 20:25:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 794 flow [2021-10-15 20:25:27,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 784 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 20:25:27,785 INFO L242 Difference]: Finished difference. Result has 68 places, 73 transitions, 598 flow [2021-10-15 20:25:27,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=598, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2021-10-15 20:25:27,785 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2021-10-15 20:25:27,786 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 598 flow [2021-10-15 20:25:27,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:27,786 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:27,786 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:27,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:28,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:28,009 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:28,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2117505209, now seen corresponding path program 5 times [2021-10-15 20:25:28,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:28,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948541367] [2021-10-15 20:25:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:28,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:28,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:28,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353446023] [2021-10-15 20:25:28,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:25:28,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:28,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:28,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:28,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 20:25:28,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-15 20:25:28,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:25:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-15 20:25:28,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:28,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948541367] [2021-10-15 20:25:28,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:28,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353446023] [2021-10-15 20:25:28,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353446023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:28,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:28,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:25:28,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163010392] [2021-10-15 20:25:28,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:25:28,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:28,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:25:28,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:25:28,704 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:28,705 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 598 flow. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:28,705 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:28,705 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:28,705 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:28,837 INFO L129 PetriNetUnfolder]: 14/134 cut-off events. [2021-10-15 20:25:28,837 INFO L130 PetriNetUnfolder]: For 372/372 co-relation queries the response was YES. [2021-10-15 20:25:28,838 INFO L84 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 134 events. 14/134 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 531. Up to 46 conditions per place. [2021-10-15 20:25:28,839 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 63 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2021-10-15 20:25:28,839 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 922 flow [2021-10-15 20:25:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:25:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:25:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2021-10-15 20:25:28,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6820652173913043 [2021-10-15 20:25:28,841 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 251 transitions. [2021-10-15 20:25:28,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 251 transitions. [2021-10-15 20:25:28,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:28,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 251 transitions. [2021-10-15 20:25:28,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 31.375) internal successors, (251), 8 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:28,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:28,845 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:28,845 INFO L186 Difference]: Start difference. First operand has 68 places, 73 transitions, 598 flow. Second operand 8 states and 251 transitions. [2021-10-15 20:25:28,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 922 flow [2021-10-15 20:25:28,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 868 flow, removed 12 selfloop flow, removed 5 redundant places. [2021-10-15 20:25:28,852 INFO L242 Difference]: Finished difference. Result has 71 places, 76 transitions, 649 flow [2021-10-15 20:25:28,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=544, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=649, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2021-10-15 20:25:28,853 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2021-10-15 20:25:28,853 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 649 flow [2021-10-15 20:25:28,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:28,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:28,854 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:28,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:29,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 20:25:29,080 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:29,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1931481250, now seen corresponding path program 6 times [2021-10-15 20:25:29,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:29,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640925640] [2021-10-15 20:25:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:29,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:29,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:29,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797213549] [2021-10-15 20:25:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:25:29,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:29,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:29,098 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:29,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 20:25:29,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-15 20:25:29,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:25:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-10-15 20:25:30,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:30,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640925640] [2021-10-15 20:25:30,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:30,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797213549] [2021-10-15 20:25:30,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797213549] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:30,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:30,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:25:30,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149131939] [2021-10-15 20:25:30,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:25:30,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:30,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:25:30,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:25:30,085 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:30,085 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 649 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,085 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:30,085 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:30,085 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:30,181 INFO L129 PetriNetUnfolder]: 17/146 cut-off events. [2021-10-15 20:25:30,181 INFO L130 PetriNetUnfolder]: For 393/393 co-relation queries the response was YES. [2021-10-15 20:25:30,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 146 events. 17/146 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 3/149 useless extension candidates. Maximal degree in co-relation 585. Up to 51 conditions per place. [2021-10-15 20:25:30,183 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 33 selfloop transitions, 39 changer transitions 0/97 dead transitions. [2021-10-15 20:25:30,183 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 895 flow [2021-10-15 20:25:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:25:30,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:25:30,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2021-10-15 20:25:30,185 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7130434782608696 [2021-10-15 20:25:30,185 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 164 transitions. [2021-10-15 20:25:30,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 164 transitions. [2021-10-15 20:25:30,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:30,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 164 transitions. [2021-10-15 20:25:30,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,190 INFO L186 Difference]: Start difference. First operand has 71 places, 76 transitions, 649 flow. Second operand 5 states and 164 transitions. [2021-10-15 20:25:30,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 895 flow [2021-10-15 20:25:30,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 97 transitions, 829 flow, removed 15 selfloop flow, removed 6 redundant places. [2021-10-15 20:25:30,199 INFO L242 Difference]: Finished difference. Result has 70 places, 82 transitions, 730 flow [2021-10-15 20:25:30,199 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=730, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2021-10-15 20:25:30,200 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 44 predicate places. [2021-10-15 20:25:30,200 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 730 flow [2021-10-15 20:25:30,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:30,200 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:30,201 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:30,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:30,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:30,416 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -456780069, now seen corresponding path program 7 times [2021-10-15 20:25:30,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:30,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262268389] [2021-10-15 20:25:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:30,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:30,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:30,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166580743] [2021-10-15 20:25:30,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:25:30,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:30,446 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:30,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 20:25:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:30,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:25:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-10-15 20:25:31,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:31,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262268389] [2021-10-15 20:25:31,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:31,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166580743] [2021-10-15 20:25:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166580743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:31,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:31,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:25:31,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142100629] [2021-10-15 20:25:31,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:31,092 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:31,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 730 flow. Second operand has 10 states, 10 states have (on average 37.6) internal successors, (376), 10 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:31,093 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:31,093 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:31,093 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:31,139 INFO L129 PetriNetUnfolder]: 17/148 cut-off events. [2021-10-15 20:25:31,139 INFO L130 PetriNetUnfolder]: For 394/394 co-relation queries the response was YES. [2021-10-15 20:25:31,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 148 events. 17/148 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 1/149 useless extension candidates. Maximal degree in co-relation 542. Up to 34 conditions per place. [2021-10-15 20:25:31,145 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 11 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2021-10-15 20:25:31,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 802 flow [2021-10-15 20:25:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:25:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:25:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2021-10-15 20:25:31,147 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8282608695652174 [2021-10-15 20:25:31,148 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 381 transitions. [2021-10-15 20:25:31,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 381 transitions. [2021-10-15 20:25:31,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:31,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 381 transitions. [2021-10-15 20:25:31,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 38.1) internal successors, (381), 10 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:31,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:31,151 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:31,151 INFO L186 Difference]: Start difference. First operand has 70 places, 82 transitions, 730 flow. Second operand 10 states and 381 transitions. [2021-10-15 20:25:31,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 802 flow [2021-10-15 20:25:31,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 91 transitions, 718 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-10-15 20:25:31,160 INFO L242 Difference]: Finished difference. Result has 78 places, 83 transitions, 686 flow [2021-10-15 20:25:31,160 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=686, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2021-10-15 20:25:31,161 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-10-15 20:25:31,161 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 686 flow [2021-10-15 20:25:31,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.6) internal successors, (376), 10 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:31,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:31,162 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:31,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:31,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:31,382 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1313141479, now seen corresponding path program 8 times [2021-10-15 20:25:31,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:31,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920127681] [2021-10-15 20:25:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:31,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:31,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:31,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044966760] [2021-10-15 20:25:31,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:31,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:31,398 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:31,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 20:25:31,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:25:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:25:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-10-15 20:25:32,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:32,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920127681] [2021-10-15 20:25:32,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:32,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044966760] [2021-10-15 20:25:32,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044966760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:32,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:32,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:25:32,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898468187] [2021-10-15 20:25:32,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:25:32,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:32,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:25:32,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:25:32,057 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:32,058 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 686 flow. Second operand has 11 states, 11 states have (on average 37.63636363636363) internal successors, (414), 11 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:32,058 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:32,058 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:32,058 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:32,110 INFO L129 PetriNetUnfolder]: 17/150 cut-off events. [2021-10-15 20:25:32,111 INFO L130 PetriNetUnfolder]: For 390/390 co-relation queries the response was YES. [2021-10-15 20:25:32,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 526 conditions, 150 events. 17/150 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 500. Up to 34 conditions per place. [2021-10-15 20:25:32,113 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 12 selfloop transitions, 10 changer transitions 0/93 dead transitions. [2021-10-15 20:25:32,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 766 flow [2021-10-15 20:25:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:25:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:25:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 419 transitions. [2021-10-15 20:25:32,115 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8280632411067194 [2021-10-15 20:25:32,116 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 419 transitions. [2021-10-15 20:25:32,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 419 transitions. [2021-10-15 20:25:32,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:32,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 419 transitions. [2021-10-15 20:25:32,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 38.09090909090909) internal successors, (419), 11 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:32,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:32,119 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:32,119 INFO L186 Difference]: Start difference. First operand has 78 places, 83 transitions, 686 flow. Second operand 11 states and 419 transitions. [2021-10-15 20:25:32,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 766 flow [2021-10-15 20:25:32,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 736 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-10-15 20:25:32,129 INFO L242 Difference]: Finished difference. Result has 81 places, 84 transitions, 700 flow [2021-10-15 20:25:32,129 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=700, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2021-10-15 20:25:32,129 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 55 predicate places. [2021-10-15 20:25:32,129 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 700 flow [2021-10-15 20:25:32,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 37.63636363636363) internal successors, (414), 11 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:32,130 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:32,130 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:32,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:32,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:32,356 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash 357264343, now seen corresponding path program 9 times [2021-10-15 20:25:32,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:32,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071609295] [2021-10-15 20:25:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:32,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:32,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:32,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325999292] [2021-10-15 20:25:32,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:25:32,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:32,374 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:32,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 20:25:33,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 20:25:33,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:25:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2021-10-15 20:25:33,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:33,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071609295] [2021-10-15 20:25:33,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:33,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325999292] [2021-10-15 20:25:33,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325999292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:33,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:33,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:25:33,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172443567] [2021-10-15 20:25:33,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:33,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:33,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:33,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:33,308 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:33,309 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 700 flow. Second operand has 6 states, 6 states have (on average 36.5) internal successors, (219), 6 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:33,309 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:33,309 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:33,309 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:33,360 INFO L129 PetriNetUnfolder]: 17/152 cut-off events. [2021-10-15 20:25:33,360 INFO L130 PetriNetUnfolder]: For 385/385 co-relation queries the response was YES. [2021-10-15 20:25:33,361 INFO L84 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 152 events. 17/152 cut-off events. For 385/385 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 1/153 useless extension candidates. Maximal degree in co-relation 494. Up to 34 conditions per place. [2021-10-15 20:25:33,362 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 8 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2021-10-15 20:25:33,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 89 transitions, 742 flow [2021-10-15 20:25:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:33,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2021-10-15 20:25:33,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8115942028985508 [2021-10-15 20:25:33,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 224 transitions. [2021-10-15 20:25:33,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 224 transitions. [2021-10-15 20:25:33,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:33,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 224 transitions. [2021-10-15 20:25:33,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:33,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:33,366 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:33,367 INFO L186 Difference]: Start difference. First operand has 81 places, 84 transitions, 700 flow. Second operand 6 states and 224 transitions. [2021-10-15 20:25:33,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 89 transitions, 742 flow [2021-10-15 20:25:33,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 708 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-10-15 20:25:33,378 INFO L242 Difference]: Finished difference. Result has 78 places, 85 transitions, 690 flow [2021-10-15 20:25:33,379 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=690, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2021-10-15 20:25:33,379 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 52 predicate places. [2021-10-15 20:25:33,379 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 690 flow [2021-10-15 20:25:33,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.5) internal successors, (219), 6 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:33,380 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:33,380 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:33,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:33,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 20:25:33,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1498480299, now seen corresponding path program 10 times [2021-10-15 20:25:33,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:33,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693590806] [2021-10-15 20:25:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:33,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:33,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:33,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470338903] [2021-10-15 20:25:33,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:25:33,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:33,630 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:33,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 20:25:34,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:25:34,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:25:34,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 33 proven. 57 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2021-10-15 20:25:34,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:34,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693590806] [2021-10-15 20:25:34,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:34,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470338903] [2021-10-15 20:25:34,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470338903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:34,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:34,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:25:34,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685061977] [2021-10-15 20:25:34,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:34,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:34,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:34,298 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:34,298 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 690 flow. Second operand has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:34,298 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:34,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:34,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:34,431 INFO L129 PetriNetUnfolder]: 17/161 cut-off events. [2021-10-15 20:25:34,432 INFO L130 PetriNetUnfolder]: For 490/490 co-relation queries the response was YES. [2021-10-15 20:25:34,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 656 conditions, 161 events. 17/161 cut-off events. For 490/490 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 3/164 useless extension candidates. Maximal degree in co-relation 628. Up to 58 conditions per place. [2021-10-15 20:25:34,434 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 75 selfloop transitions, 24 changer transitions 0/127 dead transitions. [2021-10-15 20:25:34,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1071 flow [2021-10-15 20:25:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:25:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:25:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2021-10-15 20:25:34,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2021-10-15 20:25:34,436 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 282 transitions. [2021-10-15 20:25:34,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 282 transitions. [2021-10-15 20:25:34,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:34,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 282 transitions. [2021-10-15 20:25:34,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:34,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:34,440 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:34,440 INFO L186 Difference]: Start difference. First operand has 78 places, 85 transitions, 690 flow. Second operand 9 states and 282 transitions. [2021-10-15 20:25:34,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1071 flow [2021-10-15 20:25:34,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 1057 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:34,450 INFO L242 Difference]: Finished difference. Result has 83 places, 88 transitions, 793 flow [2021-10-15 20:25:34,451 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=793, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2021-10-15 20:25:34,451 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 57 predicate places. [2021-10-15 20:25:34,451 INFO L470 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 793 flow [2021-10-15 20:25:34,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 26.11111111111111) internal successors, (235), 9 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:34,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:34,452 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:34,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:34,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 20:25:34,668 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1347192242, now seen corresponding path program 11 times [2021-10-15 20:25:34,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:34,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930042520] [2021-10-15 20:25:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:34,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:34,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:34,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430294622] [2021-10-15 20:25:34,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:25:34,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:34,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:34,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 20:25:35,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-15 20:25:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:35,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:25:35,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-10-15 20:25:35,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:35,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930042520] [2021-10-15 20:25:35,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:35,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430294622] [2021-10-15 20:25:35,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430294622] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:35,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:35,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:25:35,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666703941] [2021-10-15 20:25:35,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:35,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:35,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:35,653 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 793 flow. Second operand has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:35,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:35,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:35,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:35,802 INFO L129 PetriNetUnfolder]: 17/170 cut-off events. [2021-10-15 20:25:35,803 INFO L130 PetriNetUnfolder]: For 699/699 co-relation queries the response was YES. [2021-10-15 20:25:35,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 170 events. 17/170 cut-off events. For 699/699 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 3/173 useless extension candidates. Maximal degree in co-relation 705. Up to 58 conditions per place. [2021-10-15 20:25:35,805 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 27 changer transitions 0/136 dead transitions. [2021-10-15 20:25:35,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 136 transitions, 1219 flow [2021-10-15 20:25:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:25:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:25:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 313 transitions. [2021-10-15 20:25:35,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6804347826086956 [2021-10-15 20:25:35,808 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 313 transitions. [2021-10-15 20:25:35,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 313 transitions. [2021-10-15 20:25:35,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:35,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 313 transitions. [2021-10-15 20:25:35,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 31.3) internal successors, (313), 10 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:35,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:35,815 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:35,815 INFO L186 Difference]: Start difference. First operand has 83 places, 88 transitions, 793 flow. Second operand 10 states and 313 transitions. [2021-10-15 20:25:35,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 136 transitions, 1219 flow [2021-10-15 20:25:35,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 136 transitions, 1141 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-10-15 20:25:35,827 INFO L242 Difference]: Finished difference. Result has 86 places, 91 transitions, 844 flow [2021-10-15 20:25:35,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=844, PETRI_PLACES=86, PETRI_TRANSITIONS=91} [2021-10-15 20:25:35,828 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2021-10-15 20:25:35,828 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 91 transitions, 844 flow [2021-10-15 20:25:35,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:35,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:35,829 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:35,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:36,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:36,046 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash -415207051, now seen corresponding path program 12 times [2021-10-15 20:25:36,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:36,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682971052] [2021-10-15 20:25:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:36,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:36,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:36,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536607669] [2021-10-15 20:25:36,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:25:36,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:36,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:36,063 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 20:25:37,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-15 20:25:37,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:25:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 61 proven. 7 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2021-10-15 20:25:37,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:37,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682971052] [2021-10-15 20:25:37,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:37,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536607669] [2021-10-15 20:25:37,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536607669] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:37,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:37,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:25:37,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356314606] [2021-10-15 20:25:37,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:25:37,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:25:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:25:37,690 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:37,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 91 transitions, 844 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:37,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:37,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:37,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:37,813 INFO L129 PetriNetUnfolder]: 20/182 cut-off events. [2021-10-15 20:25:37,813 INFO L130 PetriNetUnfolder]: For 687/687 co-relation queries the response was YES. [2021-10-15 20:25:37,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 182 events. 20/182 cut-off events. For 687/687 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 3/185 useless extension candidates. Maximal degree in co-relation 756. Up to 63 conditions per place. [2021-10-15 20:25:37,815 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 39 selfloop transitions, 51 changer transitions 0/118 dead transitions. [2021-10-15 20:25:37,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 1159 flow [2021-10-15 20:25:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:25:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:25:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 198 transitions. [2021-10-15 20:25:37,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2021-10-15 20:25:37,817 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 198 transitions. [2021-10-15 20:25:37,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 198 transitions. [2021-10-15 20:25:37,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:37,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 198 transitions. [2021-10-15 20:25:37,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.0) internal successors, (198), 6 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:37,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:37,819 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:37,819 INFO L186 Difference]: Start difference. First operand has 86 places, 91 transitions, 844 flow. Second operand 6 states and 198 transitions. [2021-10-15 20:25:37,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 1159 flow [2021-10-15 20:25:37,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1069 flow, removed 21 selfloop flow, removed 8 redundant places. [2021-10-15 20:25:37,844 INFO L242 Difference]: Finished difference. Result has 84 places, 97 transitions, 934 flow [2021-10-15 20:25:37,844 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=934, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2021-10-15 20:25:37,844 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 58 predicate places. [2021-10-15 20:25:37,845 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 934 flow [2021-10-15 20:25:37,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:37,845 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:37,845 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 9, 9, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:37,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:38,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:38,060 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2093706408, now seen corresponding path program 13 times [2021-10-15 20:25:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:38,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502386577] [2021-10-15 20:25:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:38,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:38,075 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:38,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88501845] [2021-10-15 20:25:38,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:25:38,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:38,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:38,077 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:38,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 20:25:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:38,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:25:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-10-15 20:25:38,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:38,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502386577] [2021-10-15 20:25:38,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:38,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88501845] [2021-10-15 20:25:38,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88501845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:38,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:38,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:25:38,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975146520] [2021-10-15 20:25:38,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:25:38,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:25:38,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:25:38,954 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:38,955 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 934 flow. Second operand has 12 states, 12 states have (on average 37.666666666666664) internal successors, (452), 12 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:38,955 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:38,955 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:38,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:39,021 INFO L129 PetriNetUnfolder]: 20/184 cut-off events. [2021-10-15 20:25:39,022 INFO L130 PetriNetUnfolder]: For 661/661 co-relation queries the response was YES. [2021-10-15 20:25:39,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 184 events. 20/184 cut-off events. For 661/661 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/185 useless extension candidates. Maximal degree in co-relation 695. Up to 42 conditions per place. [2021-10-15 20:25:39,025 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 13 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2021-10-15 20:25:39,026 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 1022 flow [2021-10-15 20:25:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:25:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:25:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 457 transitions. [2021-10-15 20:25:39,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278985507246377 [2021-10-15 20:25:39,028 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 457 transitions. [2021-10-15 20:25:39,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 457 transitions. [2021-10-15 20:25:39,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:39,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 457 transitions. [2021-10-15 20:25:39,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 38.083333333333336) internal successors, (457), 12 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:39,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:39,032 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:39,032 INFO L186 Difference]: Start difference. First operand has 84 places, 97 transitions, 934 flow. Second operand 12 states and 457 transitions. [2021-10-15 20:25:39,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 1022 flow [2021-10-15 20:25:39,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 896 flow, removed 15 selfloop flow, removed 4 redundant places. [2021-10-15 20:25:39,043 INFO L242 Difference]: Finished difference. Result has 92 places, 98 transitions, 856 flow [2021-10-15 20:25:39,044 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=856, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2021-10-15 20:25:39,044 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 66 predicate places. [2021-10-15 20:25:39,044 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 856 flow [2021-10-15 20:25:39,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.666666666666664) internal successors, (452), 12 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:39,045 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:39,045 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:39,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:39,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 20:25:39,268 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1920906794, now seen corresponding path program 14 times [2021-10-15 20:25:39,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:39,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251690951] [2021-10-15 20:25:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:39,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:39,291 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:39,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399837724] [2021-10-15 20:25:39,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:39,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:39,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:39,293 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:39,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 20:25:39,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:25:39,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:39,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:39,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-10-15 20:25:40,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:40,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251690951] [2021-10-15 20:25:40,322 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:40,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399837724] [2021-10-15 20:25:40,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399837724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:40,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:40,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 20:25:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585978331] [2021-10-15 20:25:40,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:25:40,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:40,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:25:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:25:40,324 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:40,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 856 flow. Second operand has 13 states, 13 states have (on average 37.69230769230769) internal successors, (490), 13 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:40,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:40,325 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:40,325 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:40,420 INFO L129 PetriNetUnfolder]: 20/186 cut-off events. [2021-10-15 20:25:40,420 INFO L130 PetriNetUnfolder]: For 624/624 co-relation queries the response was YES. [2021-10-15 20:25:40,421 INFO L84 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 186 events. 20/186 cut-off events. For 624/624 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 633. Up to 42 conditions per place. [2021-10-15 20:25:40,422 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 14 selfloop transitions, 12 changer transitions 0/110 dead transitions. [2021-10-15 20:25:40,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 110 transitions, 952 flow [2021-10-15 20:25:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:25:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:25:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 495 transitions. [2021-10-15 20:25:40,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8277591973244147 [2021-10-15 20:25:40,425 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 495 transitions. [2021-10-15 20:25:40,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 495 transitions. [2021-10-15 20:25:40,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:40,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 495 transitions. [2021-10-15 20:25:40,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 38.07692307692308) internal successors, (495), 13 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:40,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:40,429 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:40,429 INFO L186 Difference]: Start difference. First operand has 92 places, 98 transitions, 856 flow. Second operand 13 states and 495 transitions. [2021-10-15 20:25:40,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 110 transitions, 952 flow [2021-10-15 20:25:40,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 110 transitions, 914 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-10-15 20:25:40,440 INFO L242 Difference]: Finished difference. Result has 95 places, 99 transitions, 870 flow [2021-10-15 20:25:40,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=870, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2021-10-15 20:25:40,440 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 69 predicate places. [2021-10-15 20:25:40,440 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 870 flow [2021-10-15 20:25:40,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.69230769230769) internal successors, (490), 13 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:40,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:40,441 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:40,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 20:25:40,664 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash -930765012, now seen corresponding path program 15 times [2021-10-15 20:25:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:40,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136323827] [2021-10-15 20:25:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:40,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:40,680 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:40,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909228537] [2021-10-15 20:25:40,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:25:40,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:40,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:40,682 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:40,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 20:25:41,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 20:25:41,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:41,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:25:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2021-10-15 20:25:41,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:41,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136323827] [2021-10-15 20:25:41,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:41,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909228537] [2021-10-15 20:25:41,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909228537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:41,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:41,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:25:41,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093575497] [2021-10-15 20:25:41,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:25:41,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:41,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:25:41,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:41,806 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:41,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 870 flow. Second operand has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:41,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:41,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:41,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:41,851 INFO L129 PetriNetUnfolder]: 20/188 cut-off events. [2021-10-15 20:25:41,851 INFO L130 PetriNetUnfolder]: For 609/609 co-relation queries the response was YES. [2021-10-15 20:25:41,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 188 events. 20/188 cut-off events. For 609/609 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 50 event pairs, 0 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 624. Up to 42 conditions per place. [2021-10-15 20:25:41,853 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 9 selfloop transitions, 6 changer transitions 0/105 dead transitions. [2021-10-15 20:25:41,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 105 transitions, 920 flow [2021-10-15 20:25:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:25:41,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:25:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2021-10-15 20:25:41,855 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8105590062111802 [2021-10-15 20:25:41,856 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 261 transitions. [2021-10-15 20:25:41,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 261 transitions. [2021-10-15 20:25:41,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:41,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 261 transitions. [2021-10-15 20:25:41,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 37.285714285714285) internal successors, (261), 7 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) [2021-10-15 20:25:41,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:41,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:41,858 INFO L186 Difference]: Start difference. First operand has 95 places, 99 transitions, 870 flow. Second operand 7 states and 261 transitions. [2021-10-15 20:25:41,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 105 transitions, 920 flow [2021-10-15 20:25:41,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 105 transitions, 878 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-10-15 20:25:41,869 INFO L242 Difference]: Finished difference. Result has 91 places, 100 transitions, 856 flow [2021-10-15 20:25:41,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=856, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2021-10-15 20:25:41,870 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 65 predicate places. [2021-10-15 20:25:41,870 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 856 flow [2021-10-15 20:25:41,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.57142857142857) internal successors, (256), 7 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:41,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:41,871 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:41,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-15 20:25:42,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 20:25:42,084 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1406058194, now seen corresponding path program 16 times [2021-10-15 20:25:42,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:42,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953908213] [2021-10-15 20:25:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:42,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:42,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:42,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917759971] [2021-10-15 20:25:42,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:25:42,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:42,122 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:42,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 20:25:42,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:25:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:42,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:25:42,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-10-15 20:25:43,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:43,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953908213] [2021-10-15 20:25:43,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:43,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917759971] [2021-10-15 20:25:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917759971] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:43,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:43,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:25:43,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537267507] [2021-10-15 20:25:43,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:25:43,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:25:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:25:43,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:43,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 856 flow. Second operand has 11 states, 11 states have (on average 25.90909090909091) internal successors, (285), 11 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:43,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:43,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:43,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:43,232 INFO L129 PetriNetUnfolder]: 20/197 cut-off events. [2021-10-15 20:25:43,232 INFO L130 PetriNetUnfolder]: For 794/794 co-relation queries the response was YES. [2021-10-15 20:25:43,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 197 events. 20/197 cut-off events. For 794/794 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 50 event pairs, 0 based on Foata normal form. 3/200 useless extension candidates. Maximal degree in co-relation 789. Up to 70 conditions per place. [2021-10-15 20:25:43,235 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 93 selfloop transitions, 30 changer transitions 0/154 dead transitions. [2021-10-15 20:25:43,235 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 1339 flow [2021-10-15 20:25:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:25:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:25:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 344 transitions. [2021-10-15 20:25:43,237 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6798418972332015 [2021-10-15 20:25:43,237 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 344 transitions. [2021-10-15 20:25:43,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 344 transitions. [2021-10-15 20:25:43,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:43,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 344 transitions. [2021-10-15 20:25:43,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 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) [2021-10-15 20:25:43,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:43,240 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:43,240 INFO L186 Difference]: Start difference. First operand has 91 places, 100 transitions, 856 flow. Second operand 11 states and 344 transitions. [2021-10-15 20:25:43,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 1339 flow [2021-10-15 20:25:43,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 1321 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 20:25:43,251 INFO L242 Difference]: Finished difference. Result has 97 places, 103 transitions, 979 flow [2021-10-15 20:25:43,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=979, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2021-10-15 20:25:43,252 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2021-10-15 20:25:43,252 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 979 flow [2021-10-15 20:25:43,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.90909090909091) internal successors, (285), 11 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:43,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:43,253 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 9, 9, 9, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:43,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 20:25:43,468 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1046511027, now seen corresponding path program 17 times [2021-10-15 20:25:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:43,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189348108] [2021-10-15 20:25:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:43,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:43,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:43,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771905328] [2021-10-15 20:25:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:25:43,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:43,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:43,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 20:25:44,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-15 20:25:44,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:25:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2021-10-15 20:25:44,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:44,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189348108] [2021-10-15 20:25:44,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:44,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771905328] [2021-10-15 20:25:44,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771905328] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:44,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:44,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:25:44,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711931586] [2021-10-15 20:25:44,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:25:44,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:44,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:25:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:25:44,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:44,792 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 979 flow. Second operand has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:44,792 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:44,792 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:44,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:44,974 INFO L129 PetriNetUnfolder]: 20/206 cut-off events. [2021-10-15 20:25:44,974 INFO L130 PetriNetUnfolder]: For 1087/1087 co-relation queries the response was YES. [2021-10-15 20:25:44,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 206 events. 20/206 cut-off events. For 1087/1087 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 3/209 useless extension candidates. Maximal degree in co-relation 876. Up to 70 conditions per place. [2021-10-15 20:25:44,977 INFO L132 encePairwiseOnDemand]: 37/46 looper letters, 99 selfloop transitions, 33 changer transitions 0/163 dead transitions. [2021-10-15 20:25:44,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1507 flow [2021-10-15 20:25:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:25:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:25:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 375 transitions. [2021-10-15 20:25:44,982 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6793478260869565 [2021-10-15 20:25:44,982 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 375 transitions. [2021-10-15 20:25:44,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 375 transitions. [2021-10-15 20:25:44,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:44,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 375 transitions. [2021-10-15 20:25:44,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 31.25) internal successors, (375), 12 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:44,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:44,988 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:44,988 INFO L186 Difference]: Start difference. First operand has 97 places, 103 transitions, 979 flow. Second operand 12 states and 375 transitions. [2021-10-15 20:25:44,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1507 flow [2021-10-15 20:25:44,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 163 transitions, 1405 flow, removed 24 selfloop flow, removed 9 redundant places. [2021-10-15 20:25:45,004 INFO L242 Difference]: Finished difference. Result has 100 places, 106 transitions, 1030 flow [2021-10-15 20:25:45,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1030, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2021-10-15 20:25:45,005 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 74 predicate places. [2021-10-15 20:25:45,006 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 1030 flow [2021-10-15 20:25:45,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.833333333333332) internal successors, (310), 12 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:45,006 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:45,006 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 11, 11, 10, 10, 10, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:45,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:45,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:45,220 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1190937742, now seen corresponding path program 18 times [2021-10-15 20:25:45,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:45,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193860755] [2021-10-15 20:25:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:45,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:45,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:45,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247321331] [2021-10-15 20:25:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:25:45,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:45,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:45,293 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 20:25:46,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-15 20:25:46,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:25:46,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2021-10-15 20:25:47,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:47,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193860755] [2021-10-15 20:25:47,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:47,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247321331] [2021-10-15 20:25:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247321331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:47,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:47,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:25:47,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319877071] [2021-10-15 20:25:47,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:25:47,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:25:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:25:47,311 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:47,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 1030 flow. Second operand has 8 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:47,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:47,312 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:47,364 INFO L129 PetriNetUnfolder]: 20/208 cut-off events. [2021-10-15 20:25:47,365 INFO L130 PetriNetUnfolder]: For 964/964 co-relation queries the response was YES. [2021-10-15 20:25:47,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 208 events. 20/208 cut-off events. For 964/964 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/209 useless extension candidates. Maximal degree in co-relation 735. Up to 48 conditions per place. [2021-10-15 20:25:47,367 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 10 selfloop transitions, 7 changer transitions 0/113 dead transitions. [2021-10-15 20:25:47,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 1088 flow [2021-10-15 20:25:47,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:25:47,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:25:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 298 transitions. [2021-10-15 20:25:47,376 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8097826086956522 [2021-10-15 20:25:47,376 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 298 transitions. [2021-10-15 20:25:47,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 298 transitions. [2021-10-15 20:25:47,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:47,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 298 transitions. [2021-10-15 20:25:47,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 37.25) internal successors, (298), 8 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,379 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,379 INFO L186 Difference]: Start difference. First operand has 100 places, 106 transitions, 1030 flow. Second operand 8 states and 298 transitions. [2021-10-15 20:25:47,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 1088 flow [2021-10-15 20:25:47,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 113 transitions, 974 flow, removed 27 selfloop flow, removed 10 redundant places. [2021-10-15 20:25:47,394 INFO L242 Difference]: Finished difference. Result has 98 places, 107 transitions, 948 flow [2021-10-15 20:25:47,394 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=948, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2021-10-15 20:25:47,395 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 72 predicate places. [2021-10-15 20:25:47,395 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 948 flow [2021-10-15 20:25:47,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:47,395 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:47,396 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 11, 11, 10, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:47,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-15 20:25:47,600 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash -850800, now seen corresponding path program 19 times [2021-10-15 20:25:47,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:47,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064487690] [2021-10-15 20:25:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:47,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:47,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:47,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928923335] [2021-10-15 20:25:47,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:25:47,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:47,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:47,621 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:47,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 20:25:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:25:48,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:25:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:48,750 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-10-15 20:25:48,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:48,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064487690] [2021-10-15 20:25:48,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:48,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928923335] [2021-10-15 20:25:48,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928923335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:48,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:48,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 20:25:48,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609976396] [2021-10-15 20:25:48,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:25:48,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:48,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:25:48,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:25:48,753 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:48,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 948 flow. Second operand has 14 states, 14 states have (on average 37.714285714285715) internal successors, (528), 14 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:48,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:48,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:48,823 INFO L129 PetriNetUnfolder]: 20/210 cut-off events. [2021-10-15 20:25:48,823 INFO L130 PetriNetUnfolder]: For 830/830 co-relation queries the response was YES. [2021-10-15 20:25:48,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 210 events. 20/210 cut-off events. For 830/830 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 712. Up to 48 conditions per place. [2021-10-15 20:25:48,825 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 15 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2021-10-15 20:25:48,825 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 120 transitions, 1052 flow [2021-10-15 20:25:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:25:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:25:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 533 transitions. [2021-10-15 20:25:48,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.827639751552795 [2021-10-15 20:25:48,841 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 533 transitions. [2021-10-15 20:25:48,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 533 transitions. [2021-10-15 20:25:48,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:48,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 533 transitions. [2021-10-15 20:25:48,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 38.07142857142857) internal successors, (533), 14 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,845 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,845 INFO L186 Difference]: Start difference. First operand has 98 places, 107 transitions, 948 flow. Second operand 14 states and 533 transitions. [2021-10-15 20:25:48,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 120 transitions, 1052 flow [2021-10-15 20:25:48,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 120 transitions, 1030 flow, removed 5 selfloop flow, removed 6 redundant places. [2021-10-15 20:25:48,857 INFO L242 Difference]: Finished difference. Result has 106 places, 108 transitions, 982 flow [2021-10-15 20:25:48,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=926, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=982, PETRI_PLACES=106, PETRI_TRANSITIONS=108} [2021-10-15 20:25:48,858 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 80 predicate places. [2021-10-15 20:25:48,858 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 108 transitions, 982 flow [2021-10-15 20:25:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 37.714285714285715) internal successors, (528), 14 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:48,858 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:48,858 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:48,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-15 20:25:49,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-15 20:25:49,084 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1529376878, now seen corresponding path program 20 times [2021-10-15 20:25:49,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:49,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165958341] [2021-10-15 20:25:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:49,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:49,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:49,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040749943] [2021-10-15 20:25:49,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:25:49,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:49,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:49,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:49,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-15 20:25:49,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:25:49,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:25:49,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-10-15 20:25:50,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:50,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165958341] [2021-10-15 20:25:50,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:50,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040749943] [2021-10-15 20:25:50,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040749943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:50,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:50,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 20:25:50,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286522351] [2021-10-15 20:25:50,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:25:50,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:50,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:25:50,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:25:50,291 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:25:50,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 108 transitions, 982 flow. Second operand has 15 states, 15 states have (on average 37.733333333333334) internal successors, (566), 15 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:50,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:25:50,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:50,404 INFO L129 PetriNetUnfolder]: 20/212 cut-off events. [2021-10-15 20:25:50,404 INFO L130 PetriNetUnfolder]: For 882/882 co-relation queries the response was YES. [2021-10-15 20:25:50,405 INFO L84 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 212 events. 20/212 cut-off events. For 882/882 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 733. Up to 48 conditions per place. [2021-10-15 20:25:50,407 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 16 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2021-10-15 20:25:50,407 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 1094 flow [2021-10-15 20:25:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:25:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:25:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 571 transitions. [2021-10-15 20:25:50,410 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.827536231884058 [2021-10-15 20:25:50,410 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 571 transitions. [2021-10-15 20:25:50,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 571 transitions. [2021-10-15 20:25:50,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:50,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 571 transitions. [2021-10-15 20:25:50,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 38.06666666666667) internal successors, (571), 15 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,416 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,416 INFO L186 Difference]: Start difference. First operand has 106 places, 108 transitions, 982 flow. Second operand 15 states and 571 transitions. [2021-10-15 20:25:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 1094 flow [2021-10-15 20:25:50,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 122 transitions, 1048 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-10-15 20:25:50,431 INFO L242 Difference]: Finished difference. Result has 109 places, 109 transitions, 996 flow [2021-10-15 20:25:50,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=996, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2021-10-15 20:25:50,433 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 83 predicate places. [2021-10-15 20:25:50,433 INFO L470 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 996 flow [2021-10-15 20:25:50,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.733333333333334) internal successors, (566), 15 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:50,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:50,434 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 10, 10, 10, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:50,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:50,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:50,648 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1564122604, now seen corresponding path program 21 times [2021-10-15 20:25:50,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:50,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085241529] [2021-10-15 20:25:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:50,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:50,675 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:50,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878327098] [2021-10-15 20:25:50,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:25:50,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:50,678 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:50,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-15 20:25:52,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-15 20:25:52,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:25:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-10-15 20:25:52,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:52,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085241529] [2021-10-15 20:25:52,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:52,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878327098] [2021-10-15 20:25:52,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878327098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:52,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:52,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:25:52,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069341157] [2021-10-15 20:25:52,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:25:52,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:25:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:25:52,757 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:52,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 996 flow. Second operand has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,758 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:52,758 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:52,758 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:52,915 INFO L129 PetriNetUnfolder]: 23/224 cut-off events. [2021-10-15 20:25:52,915 INFO L130 PetriNetUnfolder]: For 904/904 co-relation queries the response was YES. [2021-10-15 20:25:52,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 224 events. 23/224 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 54 event pairs, 0 based on Foata normal form. 3/227 useless extension candidates. Maximal degree in co-relation 910. Up to 75 conditions per place. [2021-10-15 20:25:52,918 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 45 selfloop transitions, 63 changer transitions 0/142 dead transitions. [2021-10-15 20:25:52,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 142 transitions, 1377 flow [2021-10-15 20:25:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:25:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:25:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 232 transitions. [2021-10-15 20:25:52,927 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7204968944099379 [2021-10-15 20:25:52,928 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 232 transitions. [2021-10-15 20:25:52,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 232 transitions. [2021-10-15 20:25:52,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:52,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 232 transitions. [2021-10-15 20:25:52,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 33.142857142857146) internal successors, (232), 7 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,937 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,937 INFO L186 Difference]: Start difference. First operand has 109 places, 109 transitions, 996 flow. Second operand 7 states and 232 transitions. [2021-10-15 20:25:52,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 142 transitions, 1377 flow [2021-10-15 20:25:52,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 142 transitions, 1327 flow, removed 12 selfloop flow, removed 13 redundant places. [2021-10-15 20:25:52,953 INFO L242 Difference]: Finished difference. Result has 103 places, 115 transitions, 1156 flow [2021-10-15 20:25:52,954 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1156, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2021-10-15 20:25:52,954 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 77 predicate places. [2021-10-15 20:25:52,954 INFO L470 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 1156 flow [2021-10-15 20:25:52,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.0) internal successors, (182), 7 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:52,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:52,955 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 10, 10, 10, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:52,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:53,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:53,165 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1742671255, now seen corresponding path program 22 times [2021-10-15 20:25:53,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:53,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993327622] [2021-10-15 20:25:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:53,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:53,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:53,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748061456] [2021-10-15 20:25:53,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:25:53,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:53,186 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:53,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-15 20:25:53,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:25:53,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:53,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:25:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 117 proven. 155 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2021-10-15 20:25:54,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:54,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993327622] [2021-10-15 20:25:54,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:54,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748061456] [2021-10-15 20:25:54,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748061456] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:54,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:54,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 20:25:54,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262077538] [2021-10-15 20:25:54,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:25:54,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:25:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:25:54,456 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:25:54,456 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 1156 flow. Second operand has 13 states, 13 states have (on average 25.76923076923077) internal successors, (335), 13 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:54,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:25:54,457 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:54,654 INFO L129 PetriNetUnfolder]: 23/230 cut-off events. [2021-10-15 20:25:54,654 INFO L130 PetriNetUnfolder]: For 1143/1143 co-relation queries the response was YES. [2021-10-15 20:25:54,656 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 230 events. 23/230 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 3/233 useless extension candidates. Maximal degree in co-relation 1014. Up to 61 conditions per place. [2021-10-15 20:25:54,657 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 93 selfloop transitions, 51 changer transitions 0/178 dead transitions. [2021-10-15 20:25:54,658 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 178 transitions, 1720 flow [2021-10-15 20:25:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:25:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:25:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 406 transitions. [2021-10-15 20:25:54,659 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6789297658862876 [2021-10-15 20:25:54,660 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 406 transitions. [2021-10-15 20:25:54,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 406 transitions. [2021-10-15 20:25:54,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:54,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 406 transitions. [2021-10-15 20:25:54,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 31.23076923076923) internal successors, (406), 13 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,663 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,663 INFO L186 Difference]: Start difference. First operand has 103 places, 115 transitions, 1156 flow. Second operand 13 states and 406 transitions. [2021-10-15 20:25:54,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 178 transitions, 1720 flow [2021-10-15 20:25:54,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 178 transitions, 1504 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-10-15 20:25:54,692 INFO L242 Difference]: Finished difference. Result has 112 places, 118 transitions, 1171 flow [2021-10-15 20:25:54,693 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1171, PETRI_PLACES=112, PETRI_TRANSITIONS=118} [2021-10-15 20:25:54,693 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2021-10-15 20:25:54,693 INFO L470 AbstractCegarLoop]: Abstraction has has 112 places, 118 transitions, 1171 flow [2021-10-15 20:25:54,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.76923076923077) internal successors, (335), 13 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:54,694 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:54,694 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 13, 13, 11, 11, 11, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:54,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:54,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-15 20:25:54,900 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1592646470, now seen corresponding path program 23 times [2021-10-15 20:25:54,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:54,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151562127] [2021-10-15 20:25:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:54,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:54,925 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:54,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593961041] [2021-10-15 20:25:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:25:54,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:54,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:54,926 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:54,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-15 20:25:56,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-15 20:25:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:25:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-10-15 20:25:56,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:56,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151562127] [2021-10-15 20:25:56,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:56,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593961041] [2021-10-15 20:25:56,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593961041] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:56,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:56,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:25:56,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172686451] [2021-10-15 20:25:56,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:25:56,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:56,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:25:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:25:56,769 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:56,770 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 118 transitions, 1171 flow. Second operand has 9 states, 9 states have (on average 36.666666666666664) internal successors, (330), 9 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,770 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:56,770 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:56,770 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:56,831 INFO L129 PetriNetUnfolder]: 23/232 cut-off events. [2021-10-15 20:25:56,832 INFO L130 PetriNetUnfolder]: For 1112/1112 co-relation queries the response was YES. [2021-10-15 20:25:56,833 INFO L84 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 232 events. 23/232 cut-off events. For 1112/1112 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/233 useless extension candidates. Maximal degree in co-relation 867. Up to 54 conditions per place. [2021-10-15 20:25:56,834 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 11 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2021-10-15 20:25:56,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 1237 flow [2021-10-15 20:25:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:25:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:25:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2021-10-15 20:25:56,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8091787439613527 [2021-10-15 20:25:56,840 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 335 transitions. [2021-10-15 20:25:56,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 335 transitions. [2021-10-15 20:25:56,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:56,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 335 transitions. [2021-10-15 20:25:56,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 37.22222222222222) internal successors, (335), 9 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,843 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,843 INFO L186 Difference]: Start difference. First operand has 112 places, 118 transitions, 1171 flow. Second operand 9 states and 335 transitions. [2021-10-15 20:25:56,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 1237 flow [2021-10-15 20:25:56,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 126 transitions, 1117 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-10-15 20:25:56,859 INFO L242 Difference]: Finished difference. Result has 111 places, 119 transitions, 1087 flow [2021-10-15 20:25:56,860 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1087, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2021-10-15 20:25:56,860 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 85 predicate places. [2021-10-15 20:25:56,860 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 1087 flow [2021-10-15 20:25:56,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 36.666666666666664) internal successors, (330), 9 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:56,861 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:56,861 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 13, 13, 11, 11, 11, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:56,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:57,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-15 20:25:57,076 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash -308565828, now seen corresponding path program 24 times [2021-10-15 20:25:57,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:57,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143928256] [2021-10-15 20:25:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:57,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:57,094 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:57,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488159282] [2021-10-15 20:25:57,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:25:57,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:57,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:57,096 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:57,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-15 20:25:58,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-10-15 20:25:58,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:25:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:25:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:25:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1159 trivial. 0 not checked. [2021-10-15 20:25:59,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:25:59,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143928256] [2021-10-15 20:25:59,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:25:59,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488159282] [2021-10-15 20:25:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488159282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:25:59,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:25:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:25:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323710333] [2021-10-15 20:25:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:25:59,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:25:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:25:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:25:59,344 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:25:59,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 36.7) internal successors, (367), 10 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:25:59,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:25:59,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:25:59,400 INFO L129 PetriNetUnfolder]: 23/234 cut-off events. [2021-10-15 20:25:59,400 INFO L130 PetriNetUnfolder]: For 757/757 co-relation queries the response was YES. [2021-10-15 20:25:59,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 234 events. 23/234 cut-off events. For 757/757 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 799. Up to 54 conditions per place. [2021-10-15 20:25:59,402 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 12 selfloop transitions, 9 changer transitions 0/128 dead transitions. [2021-10-15 20:25:59,402 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 128 transitions, 1161 flow [2021-10-15 20:25:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:25:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:25:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 372 transitions. [2021-10-15 20:25:59,403 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808695652173913 [2021-10-15 20:25:59,404 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 372 transitions. [2021-10-15 20:25:59,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 372 transitions. [2021-10-15 20:25:59,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:25:59,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 372 transitions. [2021-10-15 20:25:59,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 37.2) internal successors, (372), 10 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,406 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,406 INFO L186 Difference]: Start difference. First operand has 111 places, 119 transitions, 1087 flow. Second operand 10 states and 372 transitions. [2021-10-15 20:25:59,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 128 transitions, 1161 flow [2021-10-15 20:25:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 128 transitions, 1135 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-10-15 20:25:59,423 INFO L242 Difference]: Finished difference. Result has 114 places, 120 transitions, 1101 flow [2021-10-15 20:25:59,423 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1101, PETRI_PLACES=114, PETRI_TRANSITIONS=120} [2021-10-15 20:25:59,424 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 88 predicate places. [2021-10-15 20:25:59,424 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 120 transitions, 1101 flow [2021-10-15 20:25:59,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.7) internal successors, (367), 10 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:25:59,424 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:25:59,425 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 13, 13, 11, 11, 11, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:25:59,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-15 20:25:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-15 20:25:59,640 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:25:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:25:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1037317182, now seen corresponding path program 25 times [2021-10-15 20:25:59,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:25:59,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098471283] [2021-10-15 20:25:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:25:59,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:25:59,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:25:59,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63950964] [2021-10-15 20:25:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:25:59,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:25:59,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:25:59,661 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:25:59,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-15 20:26:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:26:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:01,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1223 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-10-15 20:26:01,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:01,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098471283] [2021-10-15 20:26:01,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:01,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63950964] [2021-10-15 20:26:01,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63950964] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:01,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:01,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-15 20:26:01,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126016069] [2021-10-15 20:26:01,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:26:01,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:26:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:26:01,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:01,189 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 120 transitions, 1101 flow. Second operand has 16 states, 16 states have (on average 37.75) internal successors, (604), 16 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:01,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:01,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:01,276 INFO L129 PetriNetUnfolder]: 23/236 cut-off events. [2021-10-15 20:26:01,276 INFO L130 PetriNetUnfolder]: For 829/829 co-relation queries the response was YES. [2021-10-15 20:26:01,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 236 events. 23/236 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 50 event pairs, 0 based on Foata normal form. 1/237 useless extension candidates. Maximal degree in co-relation 824. Up to 54 conditions per place. [2021-10-15 20:26:01,279 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 17 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2021-10-15 20:26:01,279 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 135 transitions, 1221 flow [2021-10-15 20:26:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:26:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 20:26:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 609 transitions. [2021-10-15 20:26:01,281 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8274456521739131 [2021-10-15 20:26:01,281 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 609 transitions. [2021-10-15 20:26:01,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 609 transitions. [2021-10-15 20:26:01,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:01,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 609 transitions. [2021-10-15 20:26:01,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 38.0625) internal successors, (609), 16 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,285 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,285 INFO L186 Difference]: Start difference. First operand has 114 places, 120 transitions, 1101 flow. Second operand 16 states and 609 transitions. [2021-10-15 20:26:01,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 135 transitions, 1221 flow [2021-10-15 20:26:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 135 transitions, 1191 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-10-15 20:26:01,300 INFO L242 Difference]: Finished difference. Result has 122 places, 121 transitions, 1135 flow [2021-10-15 20:26:01,301 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1135, PETRI_PLACES=122, PETRI_TRANSITIONS=121} [2021-10-15 20:26:01,301 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2021-10-15 20:26:01,301 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 121 transitions, 1135 flow [2021-10-15 20:26:01,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 37.75) internal successors, (604), 16 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:01,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:01,302 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 11, 11, 11, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:01,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-15 20:26:01,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-15 20:26:01,528 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1148395712, now seen corresponding path program 26 times [2021-10-15 20:26:01,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:01,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112803147] [2021-10-15 20:26:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:01,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:01,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:01,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849465856] [2021-10-15 20:26:01,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:01,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:01,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:01,564 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:01,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-15 20:26:02,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:02,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:02,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 20:26:02,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-10-15 20:26:03,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:03,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112803147] [2021-10-15 20:26:03,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:03,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849465856] [2021-10-15 20:26:03,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849465856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:03,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:03,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-15 20:26:03,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298050266] [2021-10-15 20:26:03,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:26:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:26:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:26:03,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:03,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 121 transitions, 1135 flow. Second operand has 17 states, 17 states have (on average 37.76470588235294) internal successors, (642), 17 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:03,108 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:03,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:03,213 INFO L129 PetriNetUnfolder]: 23/238 cut-off events. [2021-10-15 20:26:03,213 INFO L130 PetriNetUnfolder]: For 887/887 co-relation queries the response was YES. [2021-10-15 20:26:03,214 INFO L84 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 238 events. 23/238 cut-off events. For 887/887 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 49 event pairs, 0 based on Foata normal form. 1/239 useless extension candidates. Maximal degree in co-relation 845. Up to 54 conditions per place. [2021-10-15 20:26:03,216 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 18 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2021-10-15 20:26:03,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 1263 flow [2021-10-15 20:26:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:26:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:26:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 647 transitions. [2021-10-15 20:26:03,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273657289002557 [2021-10-15 20:26:03,218 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 647 transitions. [2021-10-15 20:26:03,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 647 transitions. [2021-10-15 20:26:03,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:03,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 647 transitions. [2021-10-15 20:26:03,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 38.05882352941177) internal successors, (647), 17 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,221 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,222 INFO L186 Difference]: Start difference. First operand has 122 places, 121 transitions, 1135 flow. Second operand 17 states and 647 transitions. [2021-10-15 20:26:03,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 1263 flow [2021-10-15 20:26:03,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 137 transitions, 1209 flow, removed 13 selfloop flow, removed 14 redundant places. [2021-10-15 20:26:03,237 INFO L242 Difference]: Finished difference. Result has 125 places, 122 transitions, 1149 flow [2021-10-15 20:26:03,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1149, PETRI_PLACES=125, PETRI_TRANSITIONS=122} [2021-10-15 20:26:03,238 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 99 predicate places. [2021-10-15 20:26:03,238 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 122 transitions, 1149 flow [2021-10-15 20:26:03,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 37.76470588235294) internal successors, (642), 17 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:03,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:03,238 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 11, 11, 11, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:03,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:03,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:03,452 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:03,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:03,453 INFO L82 PathProgramCache]: Analyzing trace with hash 520680642, now seen corresponding path program 27 times [2021-10-15 20:26:03,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:03,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344347352] [2021-10-15 20:26:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:03,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:03,472 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:03,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898319724] [2021-10-15 20:26:03,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:26:03,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:03,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:03,473 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:03,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-15 20:26:05,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-15 20:26:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:05,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:26:05,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1279 backedges. 149 proven. 26 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2021-10-15 20:26:06,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344347352] [2021-10-15 20:26:06,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898319724] [2021-10-15 20:26:06,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898319724] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:06,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:06,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:26:06,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170407614] [2021-10-15 20:26:06,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:26:06,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:26:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:26:06,011 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:26:06,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 122 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,011 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:06,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:26:06,012 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:06,161 INFO L129 PetriNetUnfolder]: 26/250 cut-off events. [2021-10-15 20:26:06,162 INFO L130 PetriNetUnfolder]: For 924/924 co-relation queries the response was YES. [2021-10-15 20:26:06,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 250 events. 26/250 cut-off events. For 924/924 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 52 event pairs, 0 based on Foata normal form. 3/253 useless extension candidates. Maximal degree in co-relation 1043. Up to 78 conditions per place. [2021-10-15 20:26:06,164 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 51 selfloop transitions, 72 changer transitions 0/161 dead transitions. [2021-10-15 20:26:06,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1602 flow [2021-10-15 20:26:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:26:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:26:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 266 transitions. [2021-10-15 20:26:06,166 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7228260869565217 [2021-10-15 20:26:06,166 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 266 transitions. [2021-10-15 20:26:06,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 266 transitions. [2021-10-15 20:26:06,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:06,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 266 transitions. [2021-10-15 20:26:06,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 33.25) internal successors, (266), 8 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,167 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,167 INFO L186 Difference]: Start difference. First operand has 125 places, 122 transitions, 1149 flow. Second operand 8 states and 266 transitions. [2021-10-15 20:26:06,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1602 flow [2021-10-15 20:26:06,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 161 transitions, 1544 flow, removed 14 selfloop flow, removed 15 redundant places. [2021-10-15 20:26:06,182 INFO L242 Difference]: Finished difference. Result has 118 places, 128 transitions, 1337 flow [2021-10-15 20:26:06,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1337, PETRI_PLACES=118, PETRI_TRANSITIONS=128} [2021-10-15 20:26:06,183 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 92 predicate places. [2021-10-15 20:26:06,183 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 128 transitions, 1337 flow [2021-10-15 20:26:06,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.875) internal successors, (207), 8 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:06,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:06,184 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:06,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-15 20:26:06,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-15 20:26:06,396 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:06,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash -150301889, now seen corresponding path program 28 times [2021-10-15 20:26:06,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:06,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271764270] [2021-10-15 20:26:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:06,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:06,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:06,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497523470] [2021-10-15 20:26:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:26:06,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:06,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:06,423 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:06,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-15 20:26:07,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:26:07,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:07,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:26:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2021-10-15 20:26:08,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271764270] [2021-10-15 20:26:08,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:08,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497523470] [2021-10-15 20:26:08,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497523470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:08,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:08,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-15 20:26:08,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872575854] [2021-10-15 20:26:08,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 20:26:08,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:08,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 20:26:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-15 20:26:08,124 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:08,125 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 128 transitions, 1337 flow. Second operand has 18 states, 18 states have (on average 37.77777777777778) internal successors, (680), 18 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:08,125 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:08,125 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:08,125 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:08,215 INFO L129 PetriNetUnfolder]: 26/252 cut-off events. [2021-10-15 20:26:08,216 INFO L130 PetriNetUnfolder]: For 1158/1158 co-relation queries the response was YES. [2021-10-15 20:26:08,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 252 events. 26/252 cut-off events. For 1158/1158 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 52 event pairs, 0 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 995. Up to 57 conditions per place. [2021-10-15 20:26:08,219 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 19 selfloop transitions, 17 changer transitions 0/145 dead transitions. [2021-10-15 20:26:08,219 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 145 transitions, 1473 flow [2021-10-15 20:26:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:26:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 20:26:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 685 transitions. [2021-10-15 20:26:08,221 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8272946859903382 [2021-10-15 20:26:08,221 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 685 transitions. [2021-10-15 20:26:08,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 685 transitions. [2021-10-15 20:26:08,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:08,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 685 transitions. [2021-10-15 20:26:08,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 38.05555555555556) internal successors, (685), 18 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:08,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:08,225 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:08,225 INFO L186 Difference]: Start difference. First operand has 118 places, 128 transitions, 1337 flow. Second operand 18 states and 685 transitions. [2021-10-15 20:26:08,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 145 transitions, 1473 flow [2021-10-15 20:26:08,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 145 transitions, 1293 flow, removed 21 selfloop flow, removed 6 redundant places. [2021-10-15 20:26:08,254 INFO L242 Difference]: Finished difference. Result has 130 places, 129 transitions, 1229 flow [2021-10-15 20:26:08,255 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1229, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2021-10-15 20:26:08,255 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 104 predicate places. [2021-10-15 20:26:08,255 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 1229 flow [2021-10-15 20:26:08,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.77777777777778) internal successors, (680), 18 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:08,255 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:08,256 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:08,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:08,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:08,471 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:08,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:08,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1235978749, now seen corresponding path program 29 times [2021-10-15 20:26:08,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:08,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523511664] [2021-10-15 20:26:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:08,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:08,494 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:08,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796257908] [2021-10-15 20:26:08,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:26:08,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:08,496 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:08,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-15 20:26:13,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-10-15 20:26:13,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:13,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 20:26:13,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2021-10-15 20:26:13,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:13,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523511664] [2021-10-15 20:26:13,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:13,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796257908] [2021-10-15 20:26:13,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796257908] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:13,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:13,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-15 20:26:13,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958983403] [2021-10-15 20:26:13,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:26:13,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:13,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:26:13,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:26:13,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:13,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 1229 flow. Second operand has 19 states, 19 states have (on average 37.78947368421053) internal successors, (718), 19 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:13,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:13,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:13,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:13,818 INFO L129 PetriNetUnfolder]: 26/254 cut-off events. [2021-10-15 20:26:13,819 INFO L130 PetriNetUnfolder]: For 1043/1043 co-relation queries the response was YES. [2021-10-15 20:26:13,819 INFO L84 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 254 events. 26/254 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 53 event pairs, 0 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 912. Up to 57 conditions per place. [2021-10-15 20:26:13,821 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 20 selfloop transitions, 18 changer transitions 0/147 dead transitions. [2021-10-15 20:26:13,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 1373 flow [2021-10-15 20:26:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:26:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:26:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 723 transitions. [2021-10-15 20:26:13,822 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8272311212814645 [2021-10-15 20:26:13,822 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 723 transitions. [2021-10-15 20:26:13,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 723 transitions. [2021-10-15 20:26:13,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:13,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 723 transitions. [2021-10-15 20:26:13,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 38.05263157894737) internal successors, (723), 19 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:13,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:13,826 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:13,826 INFO L186 Difference]: Start difference. First operand has 130 places, 129 transitions, 1229 flow. Second operand 19 states and 723 transitions. [2021-10-15 20:26:13,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 1373 flow [2021-10-15 20:26:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 147 transitions, 1311 flow, removed 15 selfloop flow, removed 16 redundant places. [2021-10-15 20:26:13,845 INFO L242 Difference]: Finished difference. Result has 133 places, 130 transitions, 1243 flow [2021-10-15 20:26:13,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1243, PETRI_PLACES=133, PETRI_TRANSITIONS=130} [2021-10-15 20:26:13,846 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 107 predicate places. [2021-10-15 20:26:13,846 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 130 transitions, 1243 flow [2021-10-15 20:26:13,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 37.78947368421053) internal successors, (718), 19 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:13,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:13,847 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 11, 11, 11, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:13,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-15 20:26:14,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:14,061 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2011810107, now seen corresponding path program 30 times [2021-10-15 20:26:14,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704014930] [2021-10-15 20:26:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:14,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:14,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:14,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80054256] [2021-10-15 20:26:14,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:26:14,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:14,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:14,096 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:14,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-15 20:26:19,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-10-15 20:26:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:19,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:26:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1481 backedges. 193 proven. 57 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-10-15 20:26:19,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:19,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704014930] [2021-10-15 20:26:19,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:19,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80054256] [2021-10-15 20:26:19,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80054256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:19,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:19,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:26:19,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162120217] [2021-10-15 20:26:19,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:26:19,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:26:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:26:19,978 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:26:19,979 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 130 transitions, 1243 flow. Second operand has 10 states, 10 states have (on average 25.7) internal successors, (257), 10 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:19,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:19,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:26:19,979 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:20,209 INFO L129 PetriNetUnfolder]: 32/278 cut-off events. [2021-10-15 20:26:20,209 INFO L130 PetriNetUnfolder]: For 1181/1181 co-relation queries the response was YES. [2021-10-15 20:26:20,210 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1234 conditions, 278 events. 32/278 cut-off events. For 1181/1181 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 61 event pairs, 0 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 1185. Up to 78 conditions per place. [2021-10-15 20:26:20,213 INFO L132 encePairwiseOnDemand]: 34/46 looper letters, 63 selfloop transitions, 84 changer transitions 0/187 dead transitions. [2021-10-15 20:26:20,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 187 transitions, 1885 flow [2021-10-15 20:26:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:26:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:26:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 337 transitions. [2021-10-15 20:26:20,215 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7326086956521739 [2021-10-15 20:26:20,215 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 337 transitions. [2021-10-15 20:26:20,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 337 transitions. [2021-10-15 20:26:20,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:20,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 337 transitions. [2021-10-15 20:26:20,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 33.7) internal successors, (337), 10 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:20,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:20,219 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:20,219 INFO L186 Difference]: Start difference. First operand has 133 places, 130 transitions, 1243 flow. Second operand 10 states and 337 transitions. [2021-10-15 20:26:20,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 187 transitions, 1885 flow [2021-10-15 20:26:20,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 187 transitions, 1819 flow, removed 16 selfloop flow, removed 17 redundant places. [2021-10-15 20:26:20,250 INFO L242 Difference]: Finished difference. Result has 127 places, 142 transitions, 1555 flow [2021-10-15 20:26:20,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2021-10-15 20:26:20,251 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 101 predicate places. [2021-10-15 20:26:20,251 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1555 flow [2021-10-15 20:26:20,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.7) internal successors, (257), 10 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:20,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:20,252 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 11, 11, 11, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:20,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:20,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:20,468 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1266754971, now seen corresponding path program 31 times [2021-10-15 20:26:20,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:20,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733783388] [2021-10-15 20:26:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:20,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:20,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:20,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895567050] [2021-10-15 20:26:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:26:20,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:20,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:20,523 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:20,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-15 20:26:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:21,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 20:26:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1784 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1495 trivial. 0 not checked. [2021-10-15 20:26:22,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:22,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733783388] [2021-10-15 20:26:22,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:22,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895567050] [2021-10-15 20:26:22,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895567050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:22,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:22,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-15 20:26:22,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705801469] [2021-10-15 20:26:22,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 20:26:22,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 20:26:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-15 20:26:22,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:22,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1555 flow. Second operand has 20 states, 20 states have (on average 37.8) internal successors, (756), 20 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:22,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:22,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:22,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:22,562 INFO L129 PetriNetUnfolder]: 32/280 cut-off events. [2021-10-15 20:26:22,562 INFO L130 PetriNetUnfolder]: For 1512/1512 co-relation queries the response was YES. [2021-10-15 20:26:22,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 280 events. 32/280 cut-off events. For 1512/1512 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 58 event pairs, 0 based on Foata normal form. 1/281 useless extension candidates. Maximal degree in co-relation 1136. Up to 63 conditions per place. [2021-10-15 20:26:22,566 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 21 selfloop transitions, 19 changer transitions 0/161 dead transitions. [2021-10-15 20:26:22,566 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 161 transitions, 1707 flow [2021-10-15 20:26:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:26:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:26:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 761 transitions. [2021-10-15 20:26:22,586 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271739130434783 [2021-10-15 20:26:22,587 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 761 transitions. [2021-10-15 20:26:22,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 761 transitions. [2021-10-15 20:26:22,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:22,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 761 transitions. [2021-10-15 20:26:22,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 38.05) internal successors, (761), 20 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:22,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:22,593 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:22,593 INFO L186 Difference]: Start difference. First operand has 127 places, 142 transitions, 1555 flow. Second operand 20 states and 761 transitions. [2021-10-15 20:26:22,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 161 transitions, 1707 flow [2021-10-15 20:26:22,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 161 transitions, 1422 flow, removed 51 selfloop flow, removed 8 redundant places. [2021-10-15 20:26:22,616 INFO L242 Difference]: Finished difference. Result has 139 places, 143 transitions, 1350 flow [2021-10-15 20:26:22,617 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1350, PETRI_PLACES=139, PETRI_TRANSITIONS=143} [2021-10-15 20:26:22,618 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 113 predicate places. [2021-10-15 20:26:22,618 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 143 transitions, 1350 flow [2021-10-15 20:26:22,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 37.8) internal successors, (756), 20 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:22,619 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:22,619 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 11, 11, 11, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:22,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-15 20:26:22,832 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:22,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:22,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1607116327, now seen corresponding path program 32 times [2021-10-15 20:26:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:22,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829335108] [2021-10-15 20:26:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:22,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:22,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:22,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033279923] [2021-10-15 20:26:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:22,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:22,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:22,861 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:22,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-15 20:26:24,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:24,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:24,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:26:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1495 trivial. 0 not checked. [2021-10-15 20:26:25,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:25,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829335108] [2021-10-15 20:26:25,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:25,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033279923] [2021-10-15 20:26:25,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033279923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:25,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:25,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-15 20:26:25,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67511677] [2021-10-15 20:26:25,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 20:26:25,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 20:26:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-15 20:26:25,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:25,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 143 transitions, 1350 flow. Second operand has 21 states, 21 states have (on average 37.80952380952381) internal successors, (794), 21 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:25,100 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:25,100 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:25,233 INFO L129 PetriNetUnfolder]: 32/282 cut-off events. [2021-10-15 20:26:25,233 INFO L130 PetriNetUnfolder]: For 1166/1166 co-relation queries the response was YES. [2021-10-15 20:26:25,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 282 events. 32/282 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 58 event pairs, 0 based on Foata normal form. 1/283 useless extension candidates. Maximal degree in co-relation 1015. Up to 63 conditions per place. [2021-10-15 20:26:25,236 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 22 selfloop transitions, 20 changer transitions 0/163 dead transitions. [2021-10-15 20:26:25,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 163 transitions, 1510 flow [2021-10-15 20:26:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:26:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:26:25,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 799 transitions. [2021-10-15 20:26:25,239 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271221532091098 [2021-10-15 20:26:25,239 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 799 transitions. [2021-10-15 20:26:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 799 transitions. [2021-10-15 20:26:25,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:25,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 799 transitions. [2021-10-15 20:26:25,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 38.04761904761905) internal successors, (799), 21 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,244 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,244 INFO L186 Difference]: Start difference. First operand has 139 places, 143 transitions, 1350 flow. Second operand 21 states and 799 transitions. [2021-10-15 20:26:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 163 transitions, 1510 flow [2021-10-15 20:26:25,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 163 transitions, 1440 flow, removed 17 selfloop flow, removed 18 redundant places. [2021-10-15 20:26:25,270 INFO L242 Difference]: Finished difference. Result has 142 places, 144 transitions, 1364 flow [2021-10-15 20:26:25,270 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1364, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2021-10-15 20:26:25,271 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 116 predicate places. [2021-10-15 20:26:25,271 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 1364 flow [2021-10-15 20:26:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 37.80952380952381) internal successors, (794), 21 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:25,271 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:25,272 INFO L254 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 11, 11, 11, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:25,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:25,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-15 20:26:25,500 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1733462377, now seen corresponding path program 33 times [2021-10-15 20:26:25,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:25,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180632661] [2021-10-15 20:26:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:25,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:25,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:25,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997998915] [2021-10-15 20:26:25,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:26:25,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:25,538 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:25,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-15 20:26:27,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-15 20:26:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:27,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:26:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2021-10-15 20:26:28,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:28,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180632661] [2021-10-15 20:26:28,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:28,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997998915] [2021-10-15 20:26:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997998915] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:28,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:28,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 20:26:28,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524762600] [2021-10-15 20:26:28,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:26:28,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:26:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:26:28,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:26:28,180 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 1364 flow. Second operand has 11 states, 11 states have (on average 36.72727272727273) internal successors, (404), 11 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,180 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:28,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:26:28,181 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:28,288 INFO L129 PetriNetUnfolder]: 32/284 cut-off events. [2021-10-15 20:26:28,288 INFO L130 PetriNetUnfolder]: For 1081/1081 co-relation queries the response was YES. [2021-10-15 20:26:28,290 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 284 events. 32/284 cut-off events. For 1081/1081 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 59 event pairs, 0 based on Foata normal form. 1/285 useless extension candidates. Maximal degree in co-relation 994. Up to 63 conditions per place. [2021-10-15 20:26:28,292 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 13 selfloop transitions, 10 changer transitions 0/154 dead transitions. [2021-10-15 20:26:28,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 154 transitions, 1446 flow [2021-10-15 20:26:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:26:28,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:26:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 409 transitions. [2021-10-15 20:26:28,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.808300395256917 [2021-10-15 20:26:28,294 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 409 transitions. [2021-10-15 20:26:28,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 409 transitions. [2021-10-15 20:26:28,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:28,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 409 transitions. [2021-10-15 20:26:28,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 37.18181818181818) internal successors, (409), 11 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,302 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,302 INFO L186 Difference]: Start difference. First operand has 142 places, 144 transitions, 1364 flow. Second operand 11 states and 409 transitions. [2021-10-15 20:26:28,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 154 transitions, 1446 flow [2021-10-15 20:26:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 154 transitions, 1372 flow, removed 18 selfloop flow, removed 19 redundant places. [2021-10-15 20:26:28,331 INFO L242 Difference]: Finished difference. Result has 134 places, 145 transitions, 1334 flow [2021-10-15 20:26:28,331 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1334, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2021-10-15 20:26:28,332 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 108 predicate places. [2021-10-15 20:26:28,332 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1334 flow [2021-10-15 20:26:28,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 36.72727272727273) internal successors, (404), 11 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,332 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:28,333 INFO L254 CegarLoopForPetriNet]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 11, 11, 11, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:28,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:28,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:28,560 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1284498197, now seen corresponding path program 34 times [2021-10-15 20:26:28,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:28,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501292998] [2021-10-15 20:26:28,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:28,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:28,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:28,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620566270] [2021-10-15 20:26:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:26:28,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:28,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:28,637 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:28,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-15 20:26:30,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:26:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 20:26:30,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2021-10-15 20:26:30,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:30,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501292998] [2021-10-15 20:26:30,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:30,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620566270] [2021-10-15 20:26:30,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620566270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:30,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:30,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-15 20:26:30,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098348344] [2021-10-15 20:26:30,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 20:26:30,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 20:26:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-15 20:26:30,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 46 [2021-10-15 20:26:30,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1334 flow. Second operand has 22 states, 22 states have (on average 37.81818181818182) internal successors, (832), 22 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:30,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 46 [2021-10-15 20:26:30,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:30,784 INFO L129 PetriNetUnfolder]: 32/285 cut-off events. [2021-10-15 20:26:30,785 INFO L130 PetriNetUnfolder]: For 1037/1037 co-relation queries the response was YES. [2021-10-15 20:26:30,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 285 events. 32/285 cut-off events. For 1037/1037 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 57 event pairs, 0 based on Foata normal form. 1/286 useless extension candidates. Maximal degree in co-relation 991. Up to 63 conditions per place. [2021-10-15 20:26:30,788 INFO L132 encePairwiseOnDemand]: 42/46 looper letters, 21 selfloop transitions, 22 changer transitions 0/165 dead transitions. [2021-10-15 20:26:30,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 165 transitions, 1460 flow [2021-10-15 20:26:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:26:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 20:26:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 836 transitions. [2021-10-15 20:26:30,789 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8260869565217391 [2021-10-15 20:26:30,790 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 836 transitions. [2021-10-15 20:26:30,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 836 transitions. [2021-10-15 20:26:30,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:30,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 836 transitions. [2021-10-15 20:26:30,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 38.0) internal successors, (836), 22 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,793 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 46.0) internal successors, (1058), 23 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,793 INFO L186 Difference]: Start difference. First operand has 134 places, 145 transitions, 1334 flow. Second operand 22 states and 836 transitions. [2021-10-15 20:26:30,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 165 transitions, 1460 flow [2021-10-15 20:26:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 165 transitions, 1426 flow, removed 8 selfloop flow, removed 9 redundant places. [2021-10-15 20:26:30,813 INFO L242 Difference]: Finished difference. Result has 148 places, 146 transitions, 1356 flow [2021-10-15 20:26:30,813 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1356, PETRI_PLACES=148, PETRI_TRANSITIONS=146} [2021-10-15 20:26:30,813 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 122 predicate places. [2021-10-15 20:26:30,814 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 146 transitions, 1356 flow [2021-10-15 20:26:30,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 37.81818181818182) internal successors, (832), 22 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,814 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:30,814 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 18, 18, 18, 18, 18, 18, 11, 11, 11, 9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:30,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:31,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:31,018 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash -569413421, now seen corresponding path program 35 times [2021-10-15 20:26:31,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:31,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706075786] [2021-10-15 20:26:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:31,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:31,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:31,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441472506] [2021-10-15 20:26:31,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:26:31,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:31,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:31,054 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-15 20:26:42,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-10-15 20:26:42,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:26:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 251 proven. 100 refuted. 0 times theorem prover too weak. 1561 trivial. 0 not checked. [2021-10-15 20:26:42,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:42,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706075786] [2021-10-15 20:26:42,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:42,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441472506] [2021-10-15 20:26:42,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441472506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:42,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:42,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:26:42,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038510723] [2021-10-15 20:26:42,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:26:42,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:26:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:26:42,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 46 [2021-10-15 20:26:42,763 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 146 transitions, 1356 flow. Second operand has 12 states, 12 states have (on average 25.583333333333332) internal successors, (307), 12 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:42,763 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:42,763 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 46 [2021-10-15 20:26:42,763 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:42,987 INFO L129 PetriNetUnfolder]: 35/300 cut-off events. [2021-10-15 20:26:42,987 INFO L130 PetriNetUnfolder]: For 1043/1043 co-relation queries the response was YES. [2021-10-15 20:26:42,989 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 300 events. 35/300 cut-off events. For 1043/1043 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 6/306 useless extension candidates. Maximal degree in co-relation 1262. Up to 78 conditions per place. [2021-10-15 20:26:42,991 INFO L132 encePairwiseOnDemand]: 31/46 looper letters, 66 selfloop transitions, 96 changer transitions 0/206 dead transitions. [2021-10-15 20:26:42,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 206 transitions, 1968 flow [2021-10-15 20:26:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:26:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:26:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 396 transitions. [2021-10-15 20:26:42,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2021-10-15 20:26:42,993 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 396 transitions. [2021-10-15 20:26:42,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 396 transitions. [2021-10-15 20:26:42,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:42,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 396 transitions. [2021-10-15 20:26:42,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 33.0) internal successors, (396), 12 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:42,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:42,995 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:42,995 INFO L186 Difference]: Start difference. First operand has 148 places, 146 transitions, 1356 flow. Second operand 12 states and 396 transitions. [2021-10-15 20:26:42,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 206 transitions, 1968 flow [2021-10-15 20:26:43,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 206 transitions, 1892 flow, removed 19 selfloop flow, removed 19 redundant places. [2021-10-15 20:26:43,019 INFO L242 Difference]: Finished difference. Result has 143 places, 155 transitions, 1610 flow [2021-10-15 20:26:43,020 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1610, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2021-10-15 20:26:43,020 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 117 predicate places. [2021-10-15 20:26:43,020 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1610 flow [2021-10-15 20:26:43,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.583333333333332) internal successors, (307), 12 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:43,021 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:43,021 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:43,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:43,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-15 20:26:43,243 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1702136883, now seen corresponding path program 36 times [2021-10-15 20:26:43,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:43,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613959940] [2021-10-15 20:26:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:43,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:43,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:43,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609888423] [2021-10-15 20:26:43,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:26:43,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:43,274 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:43,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-15 20:26:48,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-15 20:26:48,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:48,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:26:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:26:49,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:49,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613959940] [2021-10-15 20:26:49,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:49,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609888423] [2021-10-15 20:26:49,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609888423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:49,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:49,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:26:49,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346167521] [2021-10-15 20:26:49,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:26:49,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:26:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:26:49,489 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:26:49,489 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1610 flow. Second operand has 12 states, 12 states have (on average 36.75) internal successors, (441), 12 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:49,489 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:49,489 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:26:49,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:49,615 INFO L129 PetriNetUnfolder]: 35/302 cut-off events. [2021-10-15 20:26:49,615 INFO L130 PetriNetUnfolder]: For 1223/1223 co-relation queries the response was YES. [2021-10-15 20:26:49,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1305 conditions, 302 events. 35/302 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 1248. Up to 69 conditions per place. [2021-10-15 20:26:49,619 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 14 selfloop transitions, 11 changer transitions 0/166 dead transitions. [2021-10-15 20:26:49,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 166 transitions, 1700 flow [2021-10-15 20:26:49,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:26:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:26:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 446 transitions. [2021-10-15 20:26:49,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8079710144927537 [2021-10-15 20:26:49,620 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 446 transitions. [2021-10-15 20:26:49,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 446 transitions. [2021-10-15 20:26:49,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:49,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 446 transitions. [2021-10-15 20:26:49,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.166666666666664) internal successors, (446), 12 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:49,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:49,623 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:49,623 INFO L186 Difference]: Start difference. First operand has 143 places, 155 transitions, 1610 flow. Second operand 12 states and 446 transitions. [2021-10-15 20:26:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 166 transitions, 1700 flow [2021-10-15 20:26:49,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 166 transitions, 1430 flow, removed 48 selfloop flow, removed 9 redundant places. [2021-10-15 20:26:49,651 INFO L242 Difference]: Finished difference. Result has 146 places, 156 transitions, 1388 flow [2021-10-15 20:26:49,652 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1388, PETRI_PLACES=146, PETRI_TRANSITIONS=156} [2021-10-15 20:26:49,652 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2021-10-15 20:26:49,652 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 156 transitions, 1388 flow [2021-10-15 20:26:49,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.75) internal successors, (441), 12 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:49,653 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:49,653 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:49,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:49,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-15 20:26:49,868 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:49,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:49,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2035070159, now seen corresponding path program 37 times [2021-10-15 20:26:49,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:49,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33220617] [2021-10-15 20:26:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:49,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:49,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:49,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629293825] [2021-10-15 20:26:49,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:26:49,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:49,896 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:49,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-15 20:26:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:51,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 20:26:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:26:52,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:52,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33220617] [2021-10-15 20:26:52,195 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629293825] [2021-10-15 20:26:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629293825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:52,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:52,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 20:26:52,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339574988] [2021-10-15 20:26:52,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:26:52,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:26:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:26:52,198 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:26:52,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 156 transitions, 1388 flow. Second operand has 13 states, 13 states have (on average 36.76923076923077) internal successors, (478), 13 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:52,199 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:52,199 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:26:52,199 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:52,300 INFO L129 PetriNetUnfolder]: 35/304 cut-off events. [2021-10-15 20:26:52,300 INFO L130 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2021-10-15 20:26:52,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 304 events. 35/304 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/305 useless extension candidates. Maximal degree in co-relation 1108. Up to 69 conditions per place. [2021-10-15 20:26:52,303 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 15 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2021-10-15 20:26:52,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 168 transitions, 1486 flow [2021-10-15 20:26:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:26:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:26:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2021-10-15 20:26:52,304 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2021-10-15 20:26:52,304 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 483 transitions. [2021-10-15 20:26:52,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 483 transitions. [2021-10-15 20:26:52,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:52,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 483 transitions. [2021-10-15 20:26:52,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 37.15384615384615) internal successors, (483), 13 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:52,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:52,306 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:52,307 INFO L186 Difference]: Start difference. First operand has 146 places, 156 transitions, 1388 flow. Second operand 13 states and 483 transitions. [2021-10-15 20:26:52,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 168 transitions, 1486 flow [2021-10-15 20:26:52,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 168 transitions, 1448 flow, removed 9 selfloop flow, removed 10 redundant places. [2021-10-15 20:26:52,334 INFO L242 Difference]: Finished difference. Result has 149 places, 157 transitions, 1402 flow [2021-10-15 20:26:52,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1402, PETRI_PLACES=149, PETRI_TRANSITIONS=157} [2021-10-15 20:26:52,335 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2021-10-15 20:26:52,335 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 157 transitions, 1402 flow [2021-10-15 20:26:52,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 36.76923076923077) internal successors, (478), 13 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:52,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:52,336 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:52,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:52,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:52,552 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:52,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:52,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1396589231, now seen corresponding path program 38 times [2021-10-15 20:26:52,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:52,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116304905] [2021-10-15 20:26:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:52,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:52,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:52,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3369009] [2021-10-15 20:26:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:52,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:52,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:52,622 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:52,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-15 20:26:54,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:54,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:54,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:26:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:26:54,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:54,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116304905] [2021-10-15 20:26:54,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:54,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3369009] [2021-10-15 20:26:54,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3369009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:54,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:54,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 20:26:54,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352239429] [2021-10-15 20:26:54,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:26:54,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:54,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:26:54,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:26:54,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:26:54,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 157 transitions, 1402 flow. Second operand has 14 states, 14 states have (on average 36.785714285714285) internal successors, (515), 14 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:54,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:54,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:26:54,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:54,963 INFO L129 PetriNetUnfolder]: 35/306 cut-off events. [2021-10-15 20:26:54,964 INFO L130 PetriNetUnfolder]: For 982/982 co-relation queries the response was YES. [2021-10-15 20:26:54,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1178 conditions, 306 events. 35/306 cut-off events. For 982/982 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1119. Up to 69 conditions per place. [2021-10-15 20:26:54,967 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 16 selfloop transitions, 13 changer transitions 0/170 dead transitions. [2021-10-15 20:26:54,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 170 transitions, 1508 flow [2021-10-15 20:26:54,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:26:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:26:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 520 transitions. [2021-10-15 20:26:54,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8074534161490683 [2021-10-15 20:26:54,968 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 520 transitions. [2021-10-15 20:26:54,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 520 transitions. [2021-10-15 20:26:54,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:54,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 520 transitions. [2021-10-15 20:26:54,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 37.142857142857146) internal successors, (520), 14 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:54,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:54,969 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:54,970 INFO L186 Difference]: Start difference. First operand has 149 places, 157 transitions, 1402 flow. Second operand 14 states and 520 transitions. [2021-10-15 20:26:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 170 transitions, 1508 flow [2021-10-15 20:26:54,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 170 transitions, 1466 flow, removed 10 selfloop flow, removed 11 redundant places. [2021-10-15 20:26:54,986 INFO L242 Difference]: Finished difference. Result has 152 places, 158 transitions, 1416 flow [2021-10-15 20:26:54,987 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1416, PETRI_PLACES=152, PETRI_TRANSITIONS=158} [2021-10-15 20:26:54,987 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 126 predicate places. [2021-10-15 20:26:54,987 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 158 transitions, 1416 flow [2021-10-15 20:26:54,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 36.785714285714285) internal successors, (515), 14 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:54,987 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:54,987 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 12, 12, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:55,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:55,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-10-15 20:26:55,188 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 686379693, now seen corresponding path program 39 times [2021-10-15 20:26:55,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:55,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341533254] [2021-10-15 20:26:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:55,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:55,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:55,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416755612] [2021-10-15 20:26:55,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:26:55,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:55,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:55,215 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:55,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-15 20:26:58,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-15 20:26:58,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:58,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:26:58,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:26:58,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:58,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341533254] [2021-10-15 20:26:58,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:58,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416755612] [2021-10-15 20:26:58,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416755612] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:58,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:58,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 20:26:58,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425805013] [2021-10-15 20:26:58,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:26:58,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:58,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:26:58,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:26:58,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:26:58,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 158 transitions, 1416 flow. Second operand has 15 states, 15 states have (on average 36.8) internal successors, (552), 15 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:58,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:58,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:26:58,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:58,794 INFO L129 PetriNetUnfolder]: 35/308 cut-off events. [2021-10-15 20:26:58,794 INFO L130 PetriNetUnfolder]: For 1018/1018 co-relation queries the response was YES. [2021-10-15 20:26:58,796 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 308 events. 35/308 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 1130. Up to 69 conditions per place. [2021-10-15 20:26:58,797 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 17 selfloop transitions, 14 changer transitions 0/172 dead transitions. [2021-10-15 20:26:58,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 172 transitions, 1530 flow [2021-10-15 20:26:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:26:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:26:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 557 transitions. [2021-10-15 20:26:58,799 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8072463768115942 [2021-10-15 20:26:58,799 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 557 transitions. [2021-10-15 20:26:58,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 557 transitions. [2021-10-15 20:26:58,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:58,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 557 transitions. [2021-10-15 20:26:58,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 37.13333333333333) internal successors, (557), 15 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:58,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:58,802 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:58,802 INFO L186 Difference]: Start difference. First operand has 152 places, 158 transitions, 1416 flow. Second operand 15 states and 557 transitions. [2021-10-15 20:26:58,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 172 transitions, 1530 flow [2021-10-15 20:26:58,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 172 transitions, 1484 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-10-15 20:26:58,829 INFO L242 Difference]: Finished difference. Result has 155 places, 159 transitions, 1430 flow [2021-10-15 20:26:58,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1430, PETRI_PLACES=155, PETRI_TRANSITIONS=159} [2021-10-15 20:26:58,830 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 129 predicate places. [2021-10-15 20:26:58,830 INFO L470 AbstractCegarLoop]: Abstraction has has 155 places, 159 transitions, 1430 flow [2021-10-15 20:26:58,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 36.8) internal successors, (552), 15 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:58,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:58,831 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 13, 13, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:58,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:59,037 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1074813739, now seen corresponding path program 40 times [2021-10-15 20:26:59,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:59,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377210087] [2021-10-15 20:26:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:59,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:59,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:59,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778700579] [2021-10-15 20:26:59,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:26:59,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:59,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:59,080 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-15 20:27:00,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:27:00,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:27:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:27:01,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2339 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:27:01,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377210087] [2021-10-15 20:27:01,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:27:01,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778700579] [2021-10-15 20:27:01,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778700579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:01,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:01,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-15 20:27:01,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708337409] [2021-10-15 20:27:01,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:27:01,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:27:01,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-15 20:27:01,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:27:01,675 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 159 transitions, 1430 flow. Second operand has 16 states, 16 states have (on average 36.8125) internal successors, (589), 16 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:01,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:01,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:27:01,676 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:01,762 INFO L129 PetriNetUnfolder]: 35/310 cut-off events. [2021-10-15 20:27:01,762 INFO L130 PetriNetUnfolder]: For 1057/1057 co-relation queries the response was YES. [2021-10-15 20:27:01,763 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 310 events. 35/310 cut-off events. For 1057/1057 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1141. Up to 69 conditions per place. [2021-10-15 20:27:01,765 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 18 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2021-10-15 20:27:01,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 174 transitions, 1552 flow [2021-10-15 20:27:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:27:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 20:27:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 594 transitions. [2021-10-15 20:27:01,766 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8070652173913043 [2021-10-15 20:27:01,766 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 594 transitions. [2021-10-15 20:27:01,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 594 transitions. [2021-10-15 20:27:01,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:01,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 594 transitions. [2021-10-15 20:27:01,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 37.125) internal successors, (594), 16 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:01,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:01,769 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:01,770 INFO L186 Difference]: Start difference. First operand has 155 places, 159 transitions, 1430 flow. Second operand 16 states and 594 transitions. [2021-10-15 20:27:01,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 174 transitions, 1552 flow [2021-10-15 20:27:01,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 174 transitions, 1502 flow, removed 12 selfloop flow, removed 13 redundant places. [2021-10-15 20:27:01,792 INFO L242 Difference]: Finished difference. Result has 158 places, 160 transitions, 1444 flow [2021-10-15 20:27:01,792 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1444, PETRI_PLACES=158, PETRI_TRANSITIONS=160} [2021-10-15 20:27:01,792 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 132 predicate places. [2021-10-15 20:27:01,793 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 160 transitions, 1444 flow [2021-10-15 20:27:01,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 36.8125) internal successors, (589), 16 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:01,793 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:01,793 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:01,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-15 20:27:01,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:01,994 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 697777193, now seen corresponding path program 41 times [2021-10-15 20:27:01,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:01,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531726811] [2021-10-15 20:27:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:01,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:02,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:27:02,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457288698] [2021-10-15 20:27:02,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 20:27:02,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:02,028 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:02,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-15 20:27:47,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-10-15 20:27:47,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:27:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 20:27:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:27:48,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:48,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531726811] [2021-10-15 20:27:48,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:27:48,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457288698] [2021-10-15 20:27:48,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457288698] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:48,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:48,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-15 20:27:48,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396750024] [2021-10-15 20:27:48,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 20:27:48,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 20:27:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:27:48,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:27:48,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 160 transitions, 1444 flow. Second operand has 17 states, 17 states have (on average 36.8235294117647) internal successors, (626), 17 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:48,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:48,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:27:48,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:48,140 INFO L129 PetriNetUnfolder]: 35/312 cut-off events. [2021-10-15 20:27:48,141 INFO L130 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2021-10-15 20:27:48,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 312 events. 35/312 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 52 event pairs, 0 based on Foata normal form. 1/313 useless extension candidates. Maximal degree in co-relation 1152. Up to 69 conditions per place. [2021-10-15 20:27:48,143 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 19 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2021-10-15 20:27:48,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 176 transitions, 1574 flow [2021-10-15 20:27:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 20:27:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 20:27:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 631 transitions. [2021-10-15 20:27:48,144 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8069053708439897 [2021-10-15 20:27:48,144 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 631 transitions. [2021-10-15 20:27:48,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 631 transitions. [2021-10-15 20:27:48,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:48,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 631 transitions. [2021-10-15 20:27:48,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 37.11764705882353) internal successors, (631), 17 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:48,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:48,146 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:48,146 INFO L186 Difference]: Start difference. First operand has 158 places, 160 transitions, 1444 flow. Second operand 17 states and 631 transitions. [2021-10-15 20:27:48,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 176 transitions, 1574 flow [2021-10-15 20:27:48,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 176 transitions, 1520 flow, removed 13 selfloop flow, removed 14 redundant places. [2021-10-15 20:27:48,171 INFO L242 Difference]: Finished difference. Result has 161 places, 161 transitions, 1458 flow [2021-10-15 20:27:48,172 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1458, PETRI_PLACES=161, PETRI_TRANSITIONS=161} [2021-10-15 20:27:48,172 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 135 predicate places. [2021-10-15 20:27:48,172 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 161 transitions, 1458 flow [2021-10-15 20:27:48,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 36.8235294117647) internal successors, (626), 17 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:48,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:48,173 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 15, 15, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:48,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-15 20:27:48,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-15 20:27:48,400 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -857090649, now seen corresponding path program 42 times [2021-10-15 20:27:48,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:48,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732727119] [2021-10-15 20:27:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:48,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:48,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:27:48,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986133912] [2021-10-15 20:27:48,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 20:27:48,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:48,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:48,471 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:48,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-15 20:27:58,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-10-15 20:27:58,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:27:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-15 20:27:58,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:27:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2395 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:27:59,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:27:59,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732727119] [2021-10-15 20:27:59,558 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:27:59,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986133912] [2021-10-15 20:27:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986133912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:27:59,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:27:59,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-15 20:27:59,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938151859] [2021-10-15 20:27:59,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 20:27:59,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:27:59,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 20:27:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-15 20:27:59,560 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:27:59,561 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 161 transitions, 1458 flow. Second operand has 18 states, 18 states have (on average 36.833333333333336) internal successors, (663), 18 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:59,561 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:27:59,561 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:27:59,561 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:27:59,654 INFO L129 PetriNetUnfolder]: 35/314 cut-off events. [2021-10-15 20:27:59,654 INFO L130 PetriNetUnfolder]: For 1144/1144 co-relation queries the response was YES. [2021-10-15 20:27:59,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1226 conditions, 314 events. 35/314 cut-off events. For 1144/1144 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/315 useless extension candidates. Maximal degree in co-relation 1163. Up to 69 conditions per place. [2021-10-15 20:27:59,657 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 20 selfloop transitions, 17 changer transitions 0/178 dead transitions. [2021-10-15 20:27:59,657 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 178 transitions, 1596 flow [2021-10-15 20:27:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:27:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 20:27:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 668 transitions. [2021-10-15 20:27:59,671 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8067632850241546 [2021-10-15 20:27:59,671 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 668 transitions. [2021-10-15 20:27:59,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 668 transitions. [2021-10-15 20:27:59,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:27:59,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 668 transitions. [2021-10-15 20:27:59,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 37.111111111111114) internal successors, (668), 18 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:59,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:59,674 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:59,674 INFO L186 Difference]: Start difference. First operand has 161 places, 161 transitions, 1458 flow. Second operand 18 states and 668 transitions. [2021-10-15 20:27:59,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 178 transitions, 1596 flow [2021-10-15 20:27:59,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 178 transitions, 1538 flow, removed 14 selfloop flow, removed 15 redundant places. [2021-10-15 20:27:59,696 INFO L242 Difference]: Finished difference. Result has 164 places, 162 transitions, 1472 flow [2021-10-15 20:27:59,696 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1472, PETRI_PLACES=164, PETRI_TRANSITIONS=162} [2021-10-15 20:27:59,696 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 138 predicate places. [2021-10-15 20:27:59,697 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 162 transitions, 1472 flow [2021-10-15 20:27:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 36.833333333333336) internal successors, (663), 18 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:27:59,697 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:27:59,697 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 16, 16, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:27:59,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-15 20:27:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:59,924 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:27:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:27:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash -436467803, now seen corresponding path program 43 times [2021-10-15 20:27:59,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:27:59,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990765653] [2021-10-15 20:27:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:27:59,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:27:59,950 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:27:59,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436277887] [2021-10-15 20:27:59,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 20:27:59,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:27:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:27:59,952 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:27:59,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-15 20:28:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:28:02,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 20:28:02,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:28:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:28:02,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:28:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990765653] [2021-10-15 20:28:02,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:28:02,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436277887] [2021-10-15 20:28:02,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436277887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:28:02,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:28:02,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-15 20:28:02,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769780247] [2021-10-15 20:28:02,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 20:28:02,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:28:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 20:28:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-15 20:28:02,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:28:02,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 162 transitions, 1472 flow. Second operand has 19 states, 19 states have (on average 36.8421052631579) internal successors, (700), 19 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:02,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:28:02,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:28:02,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:02,785 INFO L129 PetriNetUnfolder]: 35/316 cut-off events. [2021-10-15 20:28:02,785 INFO L130 PetriNetUnfolder]: For 1192/1192 co-relation queries the response was YES. [2021-10-15 20:28:02,787 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1238 conditions, 316 events. 35/316 cut-off events. For 1192/1192 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1174. Up to 69 conditions per place. [2021-10-15 20:28:02,789 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 21 selfloop transitions, 18 changer transitions 0/180 dead transitions. [2021-10-15 20:28:02,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 180 transitions, 1618 flow [2021-10-15 20:28:02,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 20:28:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 20:28:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 705 transitions. [2021-10-15 20:28:02,791 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8066361556064073 [2021-10-15 20:28:02,791 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 705 transitions. [2021-10-15 20:28:02,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 705 transitions. [2021-10-15 20:28:02,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:28:02,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 705 transitions. [2021-10-15 20:28:02,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 37.10526315789474) internal successors, (705), 19 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:02,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:02,794 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:02,794 INFO L186 Difference]: Start difference. First operand has 164 places, 162 transitions, 1472 flow. Second operand 19 states and 705 transitions. [2021-10-15 20:28:02,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 180 transitions, 1618 flow [2021-10-15 20:28:02,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 180 transitions, 1556 flow, removed 15 selfloop flow, removed 16 redundant places. [2021-10-15 20:28:02,822 INFO L242 Difference]: Finished difference. Result has 167 places, 163 transitions, 1486 flow [2021-10-15 20:28:02,823 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1486, PETRI_PLACES=167, PETRI_TRANSITIONS=163} [2021-10-15 20:28:02,823 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 141 predicate places. [2021-10-15 20:28:02,823 INFO L470 AbstractCegarLoop]: Abstraction has has 167 places, 163 transitions, 1486 flow [2021-10-15 20:28:02,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 36.8421052631579) internal successors, (700), 19 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:02,824 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:28:02,824 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 17, 17, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:28:02,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-10-15 20:28:03,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-15 20:28:03,051 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:28:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:28:03,052 INFO L82 PathProgramCache]: Analyzing trace with hash 55161379, now seen corresponding path program 44 times [2021-10-15 20:28:03,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:28:03,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950577562] [2021-10-15 20:28:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:03,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:28:03,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:28:03,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155118987] [2021-10-15 20:28:03,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:28:03,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:28:03,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:28:03,100 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:28:03,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-15 20:28:05,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:28:05,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:28:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 20:28:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:28:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:28:05,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:28:05,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950577562] [2021-10-15 20:28:05,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:28:05,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155118987] [2021-10-15 20:28:05,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155118987] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:28:05,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:28:05,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-15 20:28:05,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462012755] [2021-10-15 20:28:05,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 20:28:05,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:28:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 20:28:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-15 20:28:05,944 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:28:05,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 163 transitions, 1486 flow. Second operand has 20 states, 20 states have (on average 36.85) internal successors, (737), 20 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:05,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:28:05,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:28:05,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:06,086 INFO L129 PetriNetUnfolder]: 35/318 cut-off events. [2021-10-15 20:28:06,087 INFO L130 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2021-10-15 20:28:06,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 318 events. 35/318 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 51 event pairs, 0 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1185. Up to 69 conditions per place. [2021-10-15 20:28:06,088 INFO L132 encePairwiseOnDemand]: 43/46 looper letters, 22 selfloop transitions, 19 changer transitions 0/182 dead transitions. [2021-10-15 20:28:06,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 182 transitions, 1640 flow [2021-10-15 20:28:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:28:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 20:28:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 742 transitions. [2021-10-15 20:28:06,091 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8065217391304348 [2021-10-15 20:28:06,091 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 742 transitions. [2021-10-15 20:28:06,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 742 transitions. [2021-10-15 20:28:06,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:28:06,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 742 transitions. [2021-10-15 20:28:06,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 37.1) internal successors, (742), 20 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:06,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:06,094 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:06,094 INFO L186 Difference]: Start difference. First operand has 167 places, 163 transitions, 1486 flow. Second operand 20 states and 742 transitions. [2021-10-15 20:28:06,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 182 transitions, 1640 flow [2021-10-15 20:28:06,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 182 transitions, 1574 flow, removed 16 selfloop flow, removed 17 redundant places. [2021-10-15 20:28:06,112 INFO L242 Difference]: Finished difference. Result has 170 places, 164 transitions, 1500 flow [2021-10-15 20:28:06,112 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1500, PETRI_PLACES=170, PETRI_TRANSITIONS=164} [2021-10-15 20:28:06,113 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2021-10-15 20:28:06,113 INFO L470 AbstractCegarLoop]: Abstraction has has 170 places, 164 transitions, 1500 flow [2021-10-15 20:28:06,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.85) internal successors, (737), 20 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:06,113 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:28:06,113 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 18, 18, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:28:06,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-15 20:28:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-10-15 20:28:06,314 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:28:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:28:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 64402721, now seen corresponding path program 45 times [2021-10-15 20:28:06,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:28:06,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905524748] [2021-10-15 20:28:06,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:06,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:28:06,369 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:28:06,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949225561] [2021-10-15 20:28:06,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:28:06,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:28:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:28:06,371 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:28:06,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-15 20:28:15,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-10-15 20:28:15,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:28:15,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 20:28:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:28:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-15 20:28:15,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:28:15,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905524748] [2021-10-15 20:28:15,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:28:15,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949225561] [2021-10-15 20:28:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949225561] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:28:15,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:28:15,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-15 20:28:15,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130119776] [2021-10-15 20:28:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 20:28:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:28:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 20:28:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-15 20:28:15,791 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 46 [2021-10-15 20:28:15,791 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 164 transitions, 1500 flow. Second operand has 21 states, 21 states have (on average 36.857142857142854) internal successors, (774), 21 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:15,791 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:28:15,791 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 46 [2021-10-15 20:28:15,792 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:28:15,890 INFO L129 PetriNetUnfolder]: 35/319 cut-off events. [2021-10-15 20:28:15,890 INFO L130 PetriNetUnfolder]: For 1144/1144 co-relation queries the response was YES. [2021-10-15 20:28:15,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1242 conditions, 319 events. 35/319 cut-off events. For 1144/1144 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 50 event pairs, 0 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 1176. Up to 69 conditions per place. [2021-10-15 20:28:15,892 INFO L132 encePairwiseOnDemand]: 42/46 looper letters, 21 selfloop transitions, 21 changer transitions 0/183 dead transitions. [2021-10-15 20:28:15,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 183 transitions, 1622 flow [2021-10-15 20:28:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 20:28:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 20:28:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 778 transitions. [2021-10-15 20:28:15,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8053830227743272 [2021-10-15 20:28:15,894 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 778 transitions. [2021-10-15 20:28:15,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 778 transitions. [2021-10-15 20:28:15,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:28:15,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 778 transitions. [2021-10-15 20:28:15,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 37.04761904761905) internal successors, (778), 21 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:15,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:15,896 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:15,896 INFO L186 Difference]: Start difference. First operand has 170 places, 164 transitions, 1500 flow. Second operand 21 states and 778 transitions. [2021-10-15 20:28:15,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 183 transitions, 1622 flow [2021-10-15 20:28:15,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 183 transitions, 1552 flow, removed 17 selfloop flow, removed 18 redundant places. [2021-10-15 20:28:15,915 INFO L242 Difference]: Finished difference. Result has 174 places, 165 transitions, 1484 flow [2021-10-15 20:28:15,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1484, PETRI_PLACES=174, PETRI_TRANSITIONS=165} [2021-10-15 20:28:15,916 INFO L334 CegarLoopForPetriNet]: 26 programPoint places, 148 predicate places. [2021-10-15 20:28:15,916 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 165 transitions, 1484 flow [2021-10-15 20:28:15,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 36.857142857142854) internal successors, (774), 21 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:28:15,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:28:15,916 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:28:15,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-10-15 20:28:16,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-15 20:28:16,117 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:28:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:28:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 355397791, now seen corresponding path program 46 times [2021-10-15 20:28:16,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:28:16,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783121181] [2021-10-15 20:28:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:28:16,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:28:16,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:28:16,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721462137] [2021-10-15 20:28:16,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 20:28:16,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:28:16,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:28:16,169 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:28:16,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-15 20:28:25,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 20:28:25,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-15 20:28:25,029 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:28:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:28:32,219 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:28:32,219 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:28:32,220 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:28:32,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-15 20:28:32,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-15 20:28:32,451 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:28:32,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:28:32 BoogieIcfgContainer [2021-10-15 20:28:32,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:28:32,620 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:28:32,620 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:28:32,620 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:28:32,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:25:16" (3/4) ... [2021-10-15 20:28:32,626 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:28:32,757 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:28:32,757 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:28:32,759 INFO L168 Benchmark]: Toolchain (without parser) took 197586.63 ms. Allocated memory was 102.8 MB in the beginning and 1.1 GB in the end (delta: 964.7 MB). Free memory was 68.6 MB in the beginning and 765.6 MB in the end (delta: -697.0 MB). Peak memory consumption was 402.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,759 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:28:32,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 416.16 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 78.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,760 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 76.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,760 INFO L168 Benchmark]: Boogie Preprocessor took 69.20 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:28:32,761 INFO L168 Benchmark]: RCFGBuilder took 459.19 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 62.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,761 INFO L168 Benchmark]: TraceAbstraction took 196421.35 ms. Allocated memory was 102.8 MB in the beginning and 1.1 GB in the end (delta: 964.7 MB). Free memory was 62.4 MB in the beginning and 638.9 MB in the end (delta: -576.5 MB). Peak memory consumption was 390.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,761 INFO L168 Benchmark]: Witness Printer took 137.79 ms. Allocated memory is still 1.1 GB. Free memory was 638.9 MB in the beginning and 765.6 MB in the end (delta: -126.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:28:32,763 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 52.4 MB in the end (delta: 28.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 416.16 ms. Allocated memory is still 102.8 MB. Free memory was 68.3 MB in the beginning and 78.5 MB in the end (delta: -10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.01 ms. Allocated memory is still 102.8 MB. Free memory was 78.5 MB in the beginning and 76.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.20 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 75.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 459.19 ms. Allocated memory is still 102.8 MB. Free memory was 75.0 MB in the beginning and 62.9 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 196421.35 ms. Allocated memory was 102.8 MB in the beginning and 1.1 GB in the end (delta: 964.7 MB). Free memory was 62.4 MB in the beginning and 638.9 MB in the end (delta: -576.5 MB). Peak memory consumption was 390.7 MB. Max. memory is 16.1 GB. * Witness Printer took 137.79 ms. Allocated memory is still 1.1 GB. Free memory was 638.9 MB in the beginning and 765.6 MB in the end (delta: -126.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 20) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 196184.0ms, OverallIterations: 59, TraceHistogramMax: 20, EmptinessCheckTime: 0.0ms, AutomataDifference: 7476.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 47.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 257 SDtfs, 1416 SDslu, 53 SDs, 0 SdLazy, 2488 SolverSat, 757 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2300.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8702 GetRequests, 8179 SyntacticMatches, 0 SemanticMatches, 523 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2995.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1610occurred in iteration=48, InterpolantAutomatonStates: 629, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 993.3ms SsaConstructionTime, 97159.2ms SatisfiabilityAnalysisTime, 22120.0ms InterpolantComputationTime, 9267 NumberOfCodeBlocks, 8276 NumberOfCodeBlocksAsserted, 337 NumberOfCheckSat, 8927 ConstructedInterpolants, 0 QuantifiedInterpolants, 11159 SizeOfPredicates, 5 NumberOfNonLiveVariables, 20281 ConjunctsInSsa, 581 ConjunctsInUnsatCore, 65 InterpolantComputations, 6 PerfectInterpolantSequences, 50126/55531 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 20:28:32,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c8ea301a-6760-4449-b934-311009a89aad/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...