./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c --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_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/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_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/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_7945fa17-84d2-4533-b3d4-64809c32ad77/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 5f53cab4236b8292945471209575d966228969e3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:58:54,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:58:54,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:58:54,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:58:54,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:58:54,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:58:54,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:58:54,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:58:55,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:58:55,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:58:55,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:58:55,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:58:55,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:58:55,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:58:55,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:58:55,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:58:55,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:58:55,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:58:55,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:58:55,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:58:55,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:58:55,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:58:55,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:58:55,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:58:55,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:58:55,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:58:55,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:58:55,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:58:55,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:58:55,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:58:55,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:58:55,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:58:55,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:58:55,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:58:55,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:58:55,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:58:55,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:58:55,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:58:55,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:58:55,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:58:55,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:58:55,085 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:58:55,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:58:55,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:58:55,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:58:55,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:58:55,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:58:55,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:58:55,119 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:58:55,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:58:55,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:58:55,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:58:55,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:58:55,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:58:55,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:58:55,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:58:55,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:58:55,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:58:55,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:58:55,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:58:55,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:58:55,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:58:55,124 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:58:55,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:58:55,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:58:55,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:58:55,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:58:55,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:58:55,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:58:55,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:58:55,126 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:58:55,126 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:58:55,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:58:55,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:58:55,127 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_7945fa17-84d2-4533-b3d4-64809c32ad77/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f53cab4236b8292945471209575d966228969e3 [2021-10-15 19:58:55,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:58:55,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:58:55,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:58:55,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:58:55,498 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:58:55,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-10-15 19:58:55,573 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/data/5fcc52803/a52cc446acc44d20ba62812a4849d615/FLAG5bcfb81f0 [2021-10-15 19:58:56,200 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:58:56,201 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c [2021-10-15 19:58:56,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/data/5fcc52803/a52cc446acc44d20ba62812a4849d615/FLAG5bcfb81f0 [2021-10-15 19:58:56,566 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/data/5fcc52803/a52cc446acc44d20ba62812a4849d615 [2021-10-15 19:58:56,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:58:56,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:58:56,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:58:56,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:58:56,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:58:56,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d7f418d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56, skipping insertion in model container [2021-10-15 19:58:56,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:58:56,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:58:56,779 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_7945fa17-84d2-4533-b3d4-64809c32ad77/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2021-10-15 19:58:56,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:58:56,811 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:58:56,855 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_7945fa17-84d2-4533-b3d4-64809c32ad77/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound10.c[458,471] [2021-10-15 19:58:56,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:58:56,881 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:58:56,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56 WrapperNode [2021-10-15 19:58:56,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:58:56,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:58:56,883 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:58:56,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:58:56,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:58:56,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:58:56,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:58:56,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:58:56,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:56,995 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:57,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:57,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:58:57,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:58:57,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:58:57,013 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:58:57,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (1/1) ... [2021-10-15 19:58:57,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:58:57,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:57,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:58:57,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:58:57,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:58:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:58:57,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:58:57,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:58:57,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:58:57,410 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 19:58:57,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:58:57 BoogieIcfgContainer [2021-10-15 19:58:57,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:58:57,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:58:57,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:58:57,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:58:57,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:58:56" (1/3) ... [2021-10-15 19:58:57,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db1803f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:58:57, skipping insertion in model container [2021-10-15 19:58:57,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:58:56" (2/3) ... [2021-10-15 19:58:57,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1db1803f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:58:57, skipping insertion in model container [2021-10-15 19:58:57,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:58:57" (3/3) ... [2021-10-15 19:58:57,423 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.c [2021-10-15 19:58:57,430 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:58:57,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-15 19:58:57,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:58:57,528 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 19:58:57,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 19:58:57,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 27 transitions, 54 flow [2021-10-15 19:58:57,586 INFO L129 PetriNetUnfolder]: 7/27 cut-off events. [2021-10-15 19:58:57,587 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:58:57,589 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 27 events. 7/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:58:57,589 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 27 transitions, 54 flow [2021-10-15 19:58:57,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 22 transitions, 44 flow [2021-10-15 19:58:57,603 INFO L129 PetriNetUnfolder]: 5/14 cut-off events. [2021-10-15 19:58:57,603 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:58:57,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:58:57,605 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:57,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:58:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:57,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-10-15 19:58:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:57,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372394733] [2021-10-15 19:58:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:57,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:57,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:58:57,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18100227] [2021-10-15 19:58:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:57,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:57,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:57,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:57,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:58:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:58:57,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:58,137 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 19:58:58,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:58,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372394733] [2021-10-15 19:58:58,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:58:58,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18100227] [2021-10-15 19:58:58,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18100227] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:58:58,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:58:58,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:58:58,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689632572] [2021-10-15 19:58:58,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:58:58,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:58,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:58:58,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:58:58,177 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:58:58,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 22 transitions, 44 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:58,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:58:58,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:58:58,183 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:58:58,601 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-10-15 19:58:58,602 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:58:58,602 INFO L84 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 25 events. 1/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-15 19:58:58,604 INFO L132 encePairwiseOnDemand]: 16/27 looper letters, 11 selfloop transitions, 4 changer transitions 3/24 dead transitions. [2021-10-15 19:58:58,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 84 flow [2021-10-15 19:58:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:58:58,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:58:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-10-15 19:58:58,620 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2021-10-15 19:58:58,621 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-10-15 19:58:58,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-10-15 19:58:58,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:58:58,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-10-15 19:58:58,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:58,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:58,642 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:58,645 INFO L186 Difference]: Start difference. First operand has 17 places, 22 transitions, 44 flow. Second operand 5 states and 75 transitions. [2021-10-15 19:58:58,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 84 flow [2021-10-15 19:58:58,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 84 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:58:58,657 INFO L242 Difference]: Finished difference. Result has 22 places, 20 transitions, 60 flow [2021-10-15 19:58:58,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=60, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2021-10-15 19:58:58,660 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 5 predicate places. [2021-10-15 19:58:58,661 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 60 flow [2021-10-15 19:58:58,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:58,662 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:58:58,662 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:58,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:58,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:58,877 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:58:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-10-15 19:58:58,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:58,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064303871] [2021-10-15 19:58:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:58,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:58,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:58:58,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222158825] [2021-10-15 19:58:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:58,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:58,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:58,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:58,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:58:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:58:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:58:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:58:59,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:58:59,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064303871] [2021-10-15 19:58:59,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:58:59,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222158825] [2021-10-15 19:58:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222158825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:58:59,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:58:59,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:58:59,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849626496] [2021-10-15 19:58:59,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:58:59,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:58:59,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:58:59,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:58:59,217 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:58:59,218 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:59,218 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:58:59,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:58:59,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:58:59,350 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-10-15 19:58:59,350 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-10-15 19:58:59,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 34 events. 1/34 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 0 based on Foata normal form. 2/36 useless extension candidates. Maximal degree in co-relation 3. Up to 12 conditions per place. [2021-10-15 19:58:59,353 INFO L132 encePairwiseOnDemand]: 20/27 looper letters, 14 selfloop transitions, 6 changer transitions 5/31 dead transitions. [2021-10-15 19:58:59,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 138 flow [2021-10-15 19:58:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:58:59,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:58:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2021-10-15 19:58:59,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2021-10-15 19:58:59,359 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 90 transitions. [2021-10-15 19:58:59,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 90 transitions. [2021-10-15 19:58:59,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:58:59,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 90 transitions. [2021-10-15 19:58:59,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 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 19:58:59,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:59,371 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:59,371 INFO L186 Difference]: Start difference. First operand has 22 places, 20 transitions, 60 flow. Second operand 7 states and 90 transitions. [2021-10-15 19:58:59,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 138 flow [2021-10-15 19:58:59,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:58:59,383 INFO L242 Difference]: Finished difference. Result has 31 places, 23 transitions, 100 flow [2021-10-15 19:58:59,384 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2021-10-15 19:58:59,385 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 14 predicate places. [2021-10-15 19:58:59,385 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 100 flow [2021-10-15 19:58:59,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:58:59,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:58:59,387 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:58:59,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:58:59,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:59,601 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:58:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:58:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2052638844, now seen corresponding path program 1 times [2021-10-15 19:58:59,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:58:59,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869750359] [2021-10-15 19:58:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:59,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:58:59,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:58:59,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636248318] [2021-10-15 19:58:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:58:59,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:58:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:58:59,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:58:59,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:58:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:58:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:58:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:00,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:00,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869750359] [2021-10-15 19:59:00,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:00,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636248318] [2021-10-15 19:59:00,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636248318] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:00,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:00,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:59:00,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077657063] [2021-10-15 19:59:00,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:59:00,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:00,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:59:00,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:59:00,284 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:00,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:00,285 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:00,285 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:00,285 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:00,552 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-10-15 19:59:00,552 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:59:00,553 INFO L84 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 31 events. 1/31 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 24 event pairs, 0 based on Foata normal form. 1/32 useless extension candidates. Maximal degree in co-relation 69. Up to 13 conditions per place. [2021-10-15 19:59:00,554 INFO L132 encePairwiseOnDemand]: 19/27 looper letters, 13 selfloop transitions, 6 changer transitions 7/31 dead transitions. [2021-10-15 19:59:00,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 172 flow [2021-10-15 19:59:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:59:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:59:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2021-10-15 19:59:00,562 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:00,563 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 99 transitions. [2021-10-15 19:59:00,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 99 transitions. [2021-10-15 19:59:00,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:00,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 99 transitions. [2021-10-15 19:59:00,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 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 19:59:00,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:00,570 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:00,570 INFO L186 Difference]: Start difference. First operand has 31 places, 23 transitions, 100 flow. Second operand 9 states and 99 transitions. [2021-10-15 19:59:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 172 flow [2021-10-15 19:59:00,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 160 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 19:59:00,579 INFO L242 Difference]: Finished difference. Result has 41 places, 23 transitions, 112 flow [2021-10-15 19:59:00,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=112, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2021-10-15 19:59:00,580 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 24 predicate places. [2021-10-15 19:59:00,580 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 112 flow [2021-10-15 19:59:00,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:00,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:00,581 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:00,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:00,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:00,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-10-15 19:59:00,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:00,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081488121] [2021-10-15 19:59:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:00,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:00,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:00,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680857270] [2021-10-15 19:59:00,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:59:00,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:00,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:00,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:59:00,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:59:00,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:00,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:59:00,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:01,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:01,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081488121] [2021-10-15 19:59:01,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:01,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680857270] [2021-10-15 19:59:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680857270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:01,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:01,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:59:01,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996657919] [2021-10-15 19:59:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:59:01,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:01,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:59:01,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:59:01,123 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:59:01,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:01,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:01,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:59:01,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:01,263 INFO L129 PetriNetUnfolder]: 1/34 cut-off events. [2021-10-15 19:59:01,264 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-10-15 19:59:01,265 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 34 events. 1/34 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 37 event pairs, 0 based on Foata normal form. 2/36 useless extension candidates. Maximal degree in co-relation 96. Up to 12 conditions per place. [2021-10-15 19:59:01,266 INFO L132 encePairwiseOnDemand]: 20/27 looper letters, 16 selfloop transitions, 7 changer transitions 2/31 dead transitions. [2021-10-15 19:59:01,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 202 flow [2021-10-15 19:59:01,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:59:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:59:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2021-10-15 19:59:01,269 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2021-10-15 19:59:01,269 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 99 transitions. [2021-10-15 19:59:01,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 99 transitions. [2021-10-15 19:59:01,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:01,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 99 transitions. [2021-10-15 19:59:01,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:59:01,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:01,276 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:01,277 INFO L186 Difference]: Start difference. First operand has 41 places, 23 transitions, 112 flow. Second operand 8 states and 99 transitions. [2021-10-15 19:59:01,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 202 flow [2021-10-15 19:59:01,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 170 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-15 19:59:01,285 INFO L242 Difference]: Finished difference. Result has 40 places, 26 transitions, 138 flow [2021-10-15 19:59:01,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=138, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2021-10-15 19:59:01,285 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 23 predicate places. [2021-10-15 19:59:01,286 INFO L470 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 138 flow [2021-10-15 19:59:01,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:01,287 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:01,287 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:01,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:01,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:01,501 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:01,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1496575115, now seen corresponding path program 2 times [2021-10-15 19:59:01,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:01,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143289704] [2021-10-15 19:59:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:01,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:01,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:01,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895984168] [2021-10-15 19:59:01,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:59:01,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:01,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:01,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:59:01,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:59:01,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:01,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:59:01,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:01,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:01,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143289704] [2021-10-15 19:59:01,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:01,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895984168] [2021-10-15 19:59:01,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895984168] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:01,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:01,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:59:01,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267300815] [2021-10-15 19:59:01,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:59:01,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:01,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:59:01,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:59:01,942 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:01,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:01,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:01,943 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:01,943 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:02,063 INFO L129 PetriNetUnfolder]: 1/31 cut-off events. [2021-10-15 19:59:02,063 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 19:59:02,065 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 31 events. 1/31 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 90. Up to 14 conditions per place. [2021-10-15 19:59:02,068 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 18 selfloop transitions, 4 changer transitions 4/31 dead transitions. [2021-10-15 19:59:02,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 208 flow [2021-10-15 19:59:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:59:02,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:59:02,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2021-10-15 19:59:02,073 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2021-10-15 19:59:02,073 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2021-10-15 19:59:02,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2021-10-15 19:59:02,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:02,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2021-10-15 19:59:02,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,077 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 27.0) internal successors, (216), 8 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,077 INFO L186 Difference]: Start difference. First operand has 40 places, 26 transitions, 138 flow. Second operand 7 states and 82 transitions. [2021-10-15 19:59:02,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 208 flow [2021-10-15 19:59:02,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 188 flow, removed 6 selfloop flow, removed 4 redundant places. [2021-10-15 19:59:02,088 INFO L242 Difference]: Finished difference. Result has 44 places, 25 transitions, 126 flow [2021-10-15 19:59:02,089 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2021-10-15 19:59:02,089 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 27 predicate places. [2021-10-15 19:59:02,089 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 126 flow [2021-10-15 19:59:02,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,090 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:02,090 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:02,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:02,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:02,305 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:02,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-10-15 19:59:02,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:02,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802885335] [2021-10-15 19:59:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:02,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:02,322 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:02,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431652788] [2021-10-15 19:59:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:59:02,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:02,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:02,324 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:02,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:59:02,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:59:02,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:02,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:59:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-15 19:59:02,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802885335] [2021-10-15 19:59:02,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:02,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431652788] [2021-10-15 19:59:02,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431652788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:02,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:02,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:59:02,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948242905] [2021-10-15 19:59:02,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:59:02,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:02,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:59:02,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:59:02,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2021-10-15 19:59:02,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:02,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2021-10-15 19:59:02,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:02,721 INFO L129 PetriNetUnfolder]: 1/24 cut-off events. [2021-10-15 19:59:02,722 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2021-10-15 19:59:02,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 24 events. 1/24 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 2/26 useless extension candidates. Maximal degree in co-relation 79. Up to 14 conditions per place. [2021-10-15 19:59:02,723 INFO L132 encePairwiseOnDemand]: 21/27 looper letters, 12 selfloop transitions, 3 changer transitions 2/21 dead transitions. [2021-10-15 19:59:02,724 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 21 transitions, 146 flow [2021-10-15 19:59:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:59:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:59:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2021-10-15 19:59:02,725 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2021-10-15 19:59:02,725 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2021-10-15 19:59:02,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2021-10-15 19:59:02,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:02,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2021-10-15 19:59:02,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,728 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,729 INFO L186 Difference]: Start difference. First operand has 44 places, 25 transitions, 126 flow. Second operand 4 states and 48 transitions. [2021-10-15 19:59:02,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 21 transitions, 146 flow [2021-10-15 19:59:02,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 21 transitions, 132 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-10-15 19:59:02,732 INFO L242 Difference]: Finished difference. Result has 34 places, 19 transitions, 100 flow [2021-10-15 19:59:02,732 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2021-10-15 19:59:02,733 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 17 predicate places. [2021-10-15 19:59:02,733 INFO L470 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 100 flow [2021-10-15 19:59:02,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:02,733 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:02,733 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:02,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:02,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:02,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:02,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1490885148, now seen corresponding path program 3 times [2021-10-15 19:59:02,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:02,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634675915] [2021-10-15 19:59:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:02,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:02,973 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:02,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620394811] [2021-10-15 19:59:02,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:59:02,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:02,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:59:03,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-15 19:59:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:59:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:03,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:03,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634675915] [2021-10-15 19:59:03,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:03,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620394811] [2021-10-15 19:59:03,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620394811] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:03,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:03,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:59:03,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661442294] [2021-10-15 19:59:03,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:59:03,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:59:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:59:03,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:03,418 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:03,418 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:03,418 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:03,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:03,555 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-10-15 19:59:03,555 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-10-15 19:59:03,555 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 26 events. 1/26 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 69. Up to 9 conditions per place. [2021-10-15 19:59:03,556 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 15 selfloop transitions, 5 changer transitions 3/26 dead transitions. [2021-10-15 19:59:03,556 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 26 transitions, 184 flow [2021-10-15 19:59:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:59:03,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:59:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2021-10-15 19:59:03,558 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:03,559 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 88 transitions. [2021-10-15 19:59:03,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 88 transitions. [2021-10-15 19:59:03,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:03,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 88 transitions. [2021-10-15 19:59:03,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.0) internal successors, (88), 8 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:03,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:03,562 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 27.0) internal successors, (243), 9 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:03,562 INFO L186 Difference]: Start difference. First operand has 34 places, 19 transitions, 100 flow. Second operand 8 states and 88 transitions. [2021-10-15 19:59:03,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 26 transitions, 184 flow [2021-10-15 19:59:03,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 26 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:59:03,565 INFO L242 Difference]: Finished difference. Result has 39 places, 20 transitions, 122 flow [2021-10-15 19:59:03,566 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=122, PETRI_PLACES=39, PETRI_TRANSITIONS=20} [2021-10-15 19:59:03,566 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 22 predicate places. [2021-10-15 19:59:03,566 INFO L470 AbstractCegarLoop]: Abstraction has has 39 places, 20 transitions, 122 flow [2021-10-15 19:59:03,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:03,567 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:03,567 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:03,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-15 19:59:03,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:03,797 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:03,797 INFO L82 PathProgramCache]: Analyzing trace with hash 515197205, now seen corresponding path program 4 times [2021-10-15 19:59:03,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:03,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988632948] [2021-10-15 19:59:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:03,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:03,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:03,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343278192] [2021-10-15 19:59:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:59:03,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:03,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:03,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:59:04,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:59:04,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:04,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 19:59:04,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:04,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:04,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988632948] [2021-10-15 19:59:04,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:04,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343278192] [2021-10-15 19:59:04,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343278192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:04,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:04,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:59:04,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821523066] [2021-10-15 19:59:04,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:59:04,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:59:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:59:04,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:04,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 20 transitions, 122 flow. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:04,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:04,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:04,409 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:04,594 INFO L129 PetriNetUnfolder]: 1/29 cut-off events. [2021-10-15 19:59:04,594 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-10-15 19:59:04,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 29 events. 1/29 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 111. Up to 9 conditions per place. [2021-10-15 19:59:04,595 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 17 selfloop transitions, 6 changer transitions 3/29 dead transitions. [2021-10-15 19:59:04,595 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 29 transitions, 230 flow [2021-10-15 19:59:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:59:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:59:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2021-10-15 19:59:04,600 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:04,600 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 99 transitions. [2021-10-15 19:59:04,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 99 transitions. [2021-10-15 19:59:04,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:04,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 99 transitions. [2021-10-15 19:59:04,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.0) internal successors, (99), 9 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 19:59:04,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:04,602 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:04,602 INFO L186 Difference]: Start difference. First operand has 39 places, 20 transitions, 122 flow. Second operand 9 states and 99 transitions. [2021-10-15 19:59:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 29 transitions, 230 flow [2021-10-15 19:59:04,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 210 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-10-15 19:59:04,605 INFO L242 Difference]: Finished difference. Result has 42 places, 21 transitions, 136 flow [2021-10-15 19:59:04,606 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=136, PETRI_PLACES=42, PETRI_TRANSITIONS=21} [2021-10-15 19:59:04,606 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 25 predicate places. [2021-10-15 19:59:04,606 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 21 transitions, 136 flow [2021-10-15 19:59:04,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:04,607 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:04,607 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:04,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:04,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:59:04,813 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash -755348412, now seen corresponding path program 5 times [2021-10-15 19:59:04,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:04,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122656416] [2021-10-15 19:59:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:04,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:04,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:04,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895850661] [2021-10-15 19:59:04,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:59:04,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:04,845 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:04,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:59:05,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:59:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-15 19:59:05,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:05,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122656416] [2021-10-15 19:59:05,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:05,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895850661] [2021-10-15 19:59:05,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895850661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:05,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:05,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:59:05,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965431738] [2021-10-15 19:59:05,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:59:05,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:59:05,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:59:05,452 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:05,453 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 21 transitions, 136 flow. Second operand has 10 states, 10 states have (on average 10.2) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:05,453 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:05,453 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:05,453 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:05,814 INFO L129 PetriNetUnfolder]: 1/32 cut-off events. [2021-10-15 19:59:05,814 INFO L130 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2021-10-15 19:59:05,814 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 32 events. 1/32 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 130. Up to 9 conditions per place. [2021-10-15 19:59:05,815 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 19 selfloop transitions, 7 changer transitions 3/32 dead transitions. [2021-10-15 19:59:05,815 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 32 transitions, 268 flow [2021-10-15 19:59:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:59:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:59:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2021-10-15 19:59:05,817 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:05,817 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 110 transitions. [2021-10-15 19:59:05,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 110 transitions. [2021-10-15 19:59:05,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:05,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 110 transitions. [2021-10-15 19:59:05,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:05,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:05,819 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 27.0) internal successors, (297), 11 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:05,820 INFO L186 Difference]: Start difference. First operand has 42 places, 21 transitions, 136 flow. Second operand 10 states and 110 transitions. [2021-10-15 19:59:05,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 32 transitions, 268 flow [2021-10-15 19:59:05,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 244 flow, removed 7 selfloop flow, removed 7 redundant places. [2021-10-15 19:59:05,824 INFO L242 Difference]: Finished difference. Result has 45 places, 22 transitions, 150 flow [2021-10-15 19:59:05,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2021-10-15 19:59:05,824 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 28 predicate places. [2021-10-15 19:59:05,825 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 150 flow [2021-10-15 19:59:05,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.2) internal successors, (102), 10 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:05,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:05,825 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:05,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:06,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:06,033 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -33044811, now seen corresponding path program 6 times [2021-10-15 19:59:06,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:06,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860772459] [2021-10-15 19:59:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:06,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:06,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:06,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378816289] [2021-10-15 19:59:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:59:06,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:06,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:59:07,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-15 19:59:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:07,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:59:07,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:07,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:07,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860772459] [2021-10-15 19:59:07,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:07,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378816289] [2021-10-15 19:59:07,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378816289] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:07,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:07,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:59:07,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074785768] [2021-10-15 19:59:07,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:59:07,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:07,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:59:07,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:59:07,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:07,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 22 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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 19:59:07,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:07,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:07,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:07,898 INFO L129 PetriNetUnfolder]: 1/35 cut-off events. [2021-10-15 19:59:07,898 INFO L130 PetriNetUnfolder]: For 116/116 co-relation queries the response was YES. [2021-10-15 19:59:07,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 35 events. 1/35 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/36 useless extension candidates. Maximal degree in co-relation 149. Up to 9 conditions per place. [2021-10-15 19:59:07,899 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 21 selfloop transitions, 8 changer transitions 3/35 dead transitions. [2021-10-15 19:59:07,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 35 transitions, 306 flow [2021-10-15 19:59:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:59:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:59:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2021-10-15 19:59:07,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:07,902 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 121 transitions. [2021-10-15 19:59:07,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 121 transitions. [2021-10-15 19:59:07,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:07,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 121 transitions. [2021-10-15 19:59:07,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 11.0) internal successors, (121), 11 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 19:59:07,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:07,905 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:07,905 INFO L186 Difference]: Start difference. First operand has 45 places, 22 transitions, 150 flow. Second operand 11 states and 121 transitions. [2021-10-15 19:59:07,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 35 transitions, 306 flow [2021-10-15 19:59:07,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 278 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-10-15 19:59:07,909 INFO L242 Difference]: Finished difference. Result has 48 places, 23 transitions, 164 flow [2021-10-15 19:59:07,910 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=23} [2021-10-15 19:59:07,910 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 31 predicate places. [2021-10-15 19:59:07,910 INFO L470 AbstractCegarLoop]: Abstraction has has 48 places, 23 transitions, 164 flow [2021-10-15 19:59:07,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 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 19:59:07,911 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:07,911 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:07,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:08,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:59:08,119 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:08,119 INFO L82 PathProgramCache]: Analyzing trace with hash 327379620, now seen corresponding path program 7 times [2021-10-15 19:59:08,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:08,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688915985] [2021-10-15 19:59:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:08,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:08,132 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617614800] [2021-10-15 19:59:08,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:59:08,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:08,134 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:08,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:59:08,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:59:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:59:08,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:09,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:09,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688915985] [2021-10-15 19:59:09,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:09,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617614800] [2021-10-15 19:59:09,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617614800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:09,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:09,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:59:09,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52050912] [2021-10-15 19:59:09,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:59:09,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:09,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:59:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:59:09,316 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:09,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 23 transitions, 164 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:09,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:09,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:09,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:09,729 INFO L129 PetriNetUnfolder]: 1/38 cut-off events. [2021-10-15 19:59:09,729 INFO L130 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2021-10-15 19:59:09,729 INFO L84 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 38 events. 1/38 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/39 useless extension candidates. Maximal degree in co-relation 168. Up to 10 conditions per place. [2021-10-15 19:59:09,730 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 23 selfloop transitions, 9 changer transitions 3/38 dead transitions. [2021-10-15 19:59:09,730 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 38 transitions, 344 flow [2021-10-15 19:59:09,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:59:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:59:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 132 transitions. [2021-10-15 19:59:09,732 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:09,732 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 132 transitions. [2021-10-15 19:59:09,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 132 transitions. [2021-10-15 19:59:09,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:09,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 132 transitions. [2021-10-15 19:59:09,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.0) internal successors, (132), 12 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 19:59:09,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:09,736 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 27.0) internal successors, (351), 13 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:09,736 INFO L186 Difference]: Start difference. First operand has 48 places, 23 transitions, 164 flow. Second operand 12 states and 132 transitions. [2021-10-15 19:59:09,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 38 transitions, 344 flow [2021-10-15 19:59:09,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 312 flow, removed 9 selfloop flow, removed 9 redundant places. [2021-10-15 19:59:09,740 INFO L242 Difference]: Finished difference. Result has 51 places, 24 transitions, 178 flow [2021-10-15 19:59:09,740 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=24} [2021-10-15 19:59:09,741 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 34 predicate places. [2021-10-15 19:59:09,741 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 24 transitions, 178 flow [2021-10-15 19:59:09,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:09,741 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:09,742 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:09,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:09,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:59:09,948 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:09,948 INFO L82 PathProgramCache]: Analyzing trace with hash 313363541, now seen corresponding path program 8 times [2021-10-15 19:59:09,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:09,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110559084] [2021-10-15 19:59:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:09,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:09,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:09,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094126148] [2021-10-15 19:59:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:59:09,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:09,976 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:10,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:59:10,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:59:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:10,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-15 19:59:10,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:11,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110559084] [2021-10-15 19:59:11,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:11,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094126148] [2021-10-15 19:59:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094126148] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:11,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:11,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:59:11,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723590225] [2021-10-15 19:59:11,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:59:11,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:59:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:59:11,071 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:11,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 24 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:11,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:11,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:11,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:11,488 INFO L129 PetriNetUnfolder]: 1/41 cut-off events. [2021-10-15 19:59:11,489 INFO L130 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2021-10-15 19:59:11,489 INFO L84 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 41 events. 1/41 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 187. Up to 11 conditions per place. [2021-10-15 19:59:11,489 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 25 selfloop transitions, 10 changer transitions 3/41 dead transitions. [2021-10-15 19:59:11,489 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 41 transitions, 382 flow [2021-10-15 19:59:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:59:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:59:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2021-10-15 19:59:11,506 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:11,506 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 143 transitions. [2021-10-15 19:59:11,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 143 transitions. [2021-10-15 19:59:11,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:11,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 143 transitions. [2021-10-15 19:59:11,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:11,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:11,509 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 27.0) internal successors, (378), 14 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:11,509 INFO L186 Difference]: Start difference. First operand has 51 places, 24 transitions, 178 flow. Second operand 13 states and 143 transitions. [2021-10-15 19:59:11,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 41 transitions, 382 flow [2021-10-15 19:59:11,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 41 transitions, 346 flow, removed 10 selfloop flow, removed 10 redundant places. [2021-10-15 19:59:11,514 INFO L242 Difference]: Finished difference. Result has 54 places, 25 transitions, 192 flow [2021-10-15 19:59:11,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=192, PETRI_PLACES=54, PETRI_TRANSITIONS=25} [2021-10-15 19:59:11,514 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 37 predicate places. [2021-10-15 19:59:11,514 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 25 transitions, 192 flow [2021-10-15 19:59:11,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.384615384615385) internal successors, (135), 13 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:11,515 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:11,515 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:11,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:59:11,729 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -627818236, now seen corresponding path program 9 times [2021-10-15 19:59:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:11,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117084747] [2021-10-15 19:59:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:11,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:11,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:11,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934115943] [2021-10-15 19:59:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:59:11,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:11,744 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:11,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:59:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-15 19:59:12,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:12,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 19:59:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:12,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:12,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117084747] [2021-10-15 19:59:12,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:12,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934115943] [2021-10-15 19:59:12,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934115943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:12,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:12,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 19:59:12,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140820705] [2021-10-15 19:59:12,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:59:12,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:59:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:59:12,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:12,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 25 transitions, 192 flow. Second operand has 14 states, 14 states have (on average 10.428571428571429) internal successors, (146), 14 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:12,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:12,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:12,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:13,425 INFO L129 PetriNetUnfolder]: 1/44 cut-off events. [2021-10-15 19:59:13,432 INFO L130 PetriNetUnfolder]: For 251/251 co-relation queries the response was YES. [2021-10-15 19:59:13,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 44 events. 1/44 cut-off events. For 251/251 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 206. Up to 12 conditions per place. [2021-10-15 19:59:13,433 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 27 selfloop transitions, 11 changer transitions 3/44 dead transitions. [2021-10-15 19:59:13,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 44 transitions, 420 flow [2021-10-15 19:59:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:59:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:59:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 154 transitions. [2021-10-15 19:59:13,438 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:13,438 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 154 transitions. [2021-10-15 19:59:13,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 154 transitions. [2021-10-15 19:59:13,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:13,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 154 transitions. [2021-10-15 19:59:13,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:13,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:13,444 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 27.0) internal successors, (405), 15 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:13,444 INFO L186 Difference]: Start difference. First operand has 54 places, 25 transitions, 192 flow. Second operand 14 states and 154 transitions. [2021-10-15 19:59:13,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 44 transitions, 420 flow [2021-10-15 19:59:13,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 380 flow, removed 11 selfloop flow, removed 11 redundant places. [2021-10-15 19:59:13,450 INFO L242 Difference]: Finished difference. Result has 57 places, 26 transitions, 206 flow [2021-10-15 19:59:13,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=206, PETRI_PLACES=57, PETRI_TRANSITIONS=26} [2021-10-15 19:59:13,450 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 40 predicate places. [2021-10-15 19:59:13,450 INFO L470 AbstractCegarLoop]: Abstraction has has 57 places, 26 transitions, 206 flow [2021-10-15 19:59:13,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.428571428571429) internal successors, (146), 14 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:13,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:13,451 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:13,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:13,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:59:13,656 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:13,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1827628555, now seen corresponding path program 10 times [2021-10-15 19:59:13,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:13,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270764749] [2021-10-15 19:59:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:13,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:13,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:13,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003938362] [2021-10-15 19:59:13,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:59:13,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:13,671 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:13,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:59:14,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:59:14,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-15 19:59:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:14,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:14,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270764749] [2021-10-15 19:59:14,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:14,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003938362] [2021-10-15 19:59:14,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003938362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:59:14,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:59:14,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 19:59:14,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835277935] [2021-10-15 19:59:14,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:59:14,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:14,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:59:14,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:59:14,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 27 [2021-10-15 19:59:14,847 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 26 transitions, 206 flow. Second operand has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 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 19:59:14,847 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:14,847 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 27 [2021-10-15 19:59:14,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:15,261 INFO L129 PetriNetUnfolder]: 1/47 cut-off events. [2021-10-15 19:59:15,261 INFO L130 PetriNetUnfolder]: For 308/308 co-relation queries the response was YES. [2021-10-15 19:59:15,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 47 events. 1/47 cut-off events. For 308/308 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 225. Up to 13 conditions per place. [2021-10-15 19:59:15,262 INFO L132 encePairwiseOnDemand]: 22/27 looper letters, 29 selfloop transitions, 12 changer transitions 3/47 dead transitions. [2021-10-15 19:59:15,262 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 458 flow [2021-10-15 19:59:15,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:59:15,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 19:59:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 165 transitions. [2021-10-15 19:59:15,265 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:59:15,265 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 165 transitions. [2021-10-15 19:59:15,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 165 transitions. [2021-10-15 19:59:15,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:15,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 165 transitions. [2021-10-15 19:59:15,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 11.0) internal successors, (165), 15 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:15,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:15,268 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:15,269 INFO L186 Difference]: Start difference. First operand has 57 places, 26 transitions, 206 flow. Second operand 15 states and 165 transitions. [2021-10-15 19:59:15,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 458 flow [2021-10-15 19:59:15,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 414 flow, removed 12 selfloop flow, removed 12 redundant places. [2021-10-15 19:59:15,274 INFO L242 Difference]: Finished difference. Result has 60 places, 27 transitions, 220 flow [2021-10-15 19:59:15,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=220, PETRI_PLACES=60, PETRI_TRANSITIONS=27} [2021-10-15 19:59:15,274 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 43 predicate places. [2021-10-15 19:59:15,275 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 27 transitions, 220 flow [2021-10-15 19:59:15,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 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 19:59:15,275 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:59:15,275 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:59:15,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:15,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:15,481 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:59:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:59:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1635962724, now seen corresponding path program 11 times [2021-10-15 19:59:15,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:59:15,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827821781] [2021-10-15 19:59:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:59:15,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:59:15,491 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:59:15,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466467553] [2021-10-15 19:59:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:59:15,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:59:15,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:59:15,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:59:15,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:59:16,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-15 19:59:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:59:16,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:59:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:59:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:59:16,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:59:16,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827821781] [2021-10-15 19:59:16,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:59:16,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466467553] [2021-10-15 19:59:16,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466467553] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:59:16,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:59:16,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-15 19:59:16,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99670714] [2021-10-15 19:59:16,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:59:16,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:59:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:59:16,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:59:16,879 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 27 [2021-10-15 19:59:16,880 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 27 transitions, 220 flow. Second operand has 15 states, 15 states have (on average 16.066666666666666) internal successors, (241), 15 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:16,880 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:59:16,880 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 27 [2021-10-15 19:59:16,880 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:59:17,229 INFO L129 PetriNetUnfolder]: 0/37 cut-off events. [2021-10-15 19:59:17,230 INFO L130 PetriNetUnfolder]: For 213/213 co-relation queries the response was YES. [2021-10-15 19:59:17,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 37 events. 0/37 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-10-15 19:59:17,230 INFO L132 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2021-10-15 19:59:17,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 22 transitions, 187 flow [2021-10-15 19:59:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:59:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 19:59:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 240 transitions. [2021-10-15 19:59:17,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2021-10-15 19:59:17,232 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 240 transitions. [2021-10-15 19:59:17,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 240 transitions. [2021-10-15 19:59:17,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:59:17,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 240 transitions. [2021-10-15 19:59:17,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:17,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:17,236 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 27.0) internal successors, (432), 16 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:17,236 INFO L186 Difference]: Start difference. First operand has 60 places, 27 transitions, 220 flow. Second operand 15 states and 240 transitions. [2021-10-15 19:59:17,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 22 transitions, 187 flow [2021-10-15 19:59:17,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 22 transitions, 158 flow, removed 0 selfloop flow, removed 15 redundant places. [2021-10-15 19:59:17,240 INFO L242 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2021-10-15 19:59:17,240 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2021-10-15 19:59:17,240 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 37 predicate places. [2021-10-15 19:59:17,240 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2021-10-15 19:59:17,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.066666666666666) internal successors, (241), 15 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:59:17,244 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:59:17,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:59:17,245 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:59:17,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:59:17,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:59:17,458 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:59:17,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:59:17 BoogieIcfgContainer [2021-10-15 19:59:17,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:59:17,464 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:59:17,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:59:17,464 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:59:17,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:58:57" (3/4) ... [2021-10-15 19:59:17,468 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:59:17,501 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 19:59:17,502 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:59:17,502 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:59:17,503 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:59:17,549 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:59:17,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:59:17,551 INFO L168 Benchmark]: Toolchain (without parser) took 20968.75 ms. Allocated memory was 117.4 MB in the beginning and 180.4 MB in the end (delta: 62.9 MB). Free memory was 88.2 MB in the beginning and 98.3 MB in the end (delta: -10.1 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,552 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 117.4 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,553 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.78 ms. Allocated memory was 117.4 MB in the beginning and 148.9 MB in the end (delta: 31.5 MB). Free memory was 88.0 MB in the beginning and 121.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.02 ms. Allocated memory is still 148.9 MB. Free memory was 121.7 MB in the beginning and 120.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,554 INFO L168 Benchmark]: Boogie Preprocessor took 56.59 ms. Allocated memory is still 148.9 MB. Free memory was 120.1 MB in the beginning and 119.3 MB in the end (delta: 786.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:59:17,555 INFO L168 Benchmark]: RCFGBuilder took 400.87 ms. Allocated memory is still 148.9 MB. Free memory was 118.9 MB in the beginning and 109.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,556 INFO L168 Benchmark]: TraceAbstraction took 20048.18 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 108.8 MB in the beginning and 100.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,556 INFO L168 Benchmark]: Witness Printer took 85.78 ms. Allocated memory is still 180.4 MB. Free memory was 100.3 MB in the beginning and 98.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:59:17,559 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 117.4 MB. Free memory is still 72.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.78 ms. Allocated memory was 117.4 MB in the beginning and 148.9 MB in the end (delta: 31.5 MB). Free memory was 88.0 MB in the beginning and 121.7 MB in the end (delta: -33.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.02 ms. Allocated memory is still 148.9 MB. Free memory was 121.7 MB in the beginning and 120.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.59 ms. Allocated memory is still 148.9 MB. Free memory was 120.1 MB in the beginning and 119.3 MB in the end (delta: 786.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 400.87 ms. Allocated memory is still 148.9 MB. Free memory was 118.9 MB in the beginning and 109.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20048.18 ms. Allocated memory was 148.9 MB in the beginning and 180.4 MB in the end (delta: 31.5 MB). Free memory was 108.8 MB in the beginning and 100.3 MB in the end (delta: 8.5 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. * Witness Printer took 85.78 ms. Allocated memory is still 180.4 MB. Free memory was 100.3 MB in the beginning and 98.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 19957.8ms, OverallIterations: 15, TraceHistogramMax: 12, EmptinessCheckTime: 0.0ms, AutomataDifference: 4790.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 59.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 124 SDtfs, 85 SDslu, 653 SDs, 0 SdLazy, 1946 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2946.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 381 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2032.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=220occurred in iteration=14, InterpolantAutomatonStates: 147, 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: 107.0ms SsaConstructionTime, 3636.3ms SatisfiabilityAnalysisTime, 5538.1ms InterpolantComputationTime, 354 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 2358 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1639 ConjunctsInSsa, 371 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 212/882 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 - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:59:17,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7945fa17-84d2-4533-b3d4-64809c32ad77/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...