./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/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 77b6325850fec9ca1372825a498dadccef3a7991 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:34:14,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:34:14,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:34:14,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:34:14,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:34:14,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:34:14,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:34:14,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:34:14,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:34:15,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:34:15,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:34:15,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:34:15,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:34:15,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:34:15,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:34:15,019 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:34:15,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:34:15,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:34:15,029 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:34:15,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:34:15,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:34:15,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:34:15,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:34:15,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:34:15,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:34:15,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:34:15,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:34:15,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:34:15,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:34:15,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:34:15,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:34:15,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:34:15,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:34:15,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:34:15,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:34:15,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:34:15,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:34:15,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:34:15,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:34:15,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:34:15,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:34:15,083 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:34:15,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:34:15,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:34:15,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:34:15,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:34:15,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:34:15,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:34:15,139 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:34:15,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:34:15,140 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:34:15,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:34:15,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:34:15,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:34:15,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:34:15,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:34:15,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:34:15,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:34:15,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:34:15,144 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:34:15,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:34:15,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:34:15,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:34:15,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:34:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:15,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:34:15,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:34:15,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:34:15,147 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:34:15,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:34:15,147 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:34:15,149 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:34:15,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:34:15,150 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:34:15,150 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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 77b6325850fec9ca1372825a498dadccef3a7991 [2021-10-15 19:34:15,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:34:15,529 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:34:15,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:34:15,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:34:15,535 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:34:15,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-10-15 19:34:15,643 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/data/52c7d7278/c3e0e2881c9b42fa977427558fb1c505/FLAG64be0044b [2021-10-15 19:34:16,339 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:34:16,344 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c [2021-10-15 19:34:16,357 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/data/52c7d7278/c3e0e2881c9b42fa977427558fb1c505/FLAG64be0044b [2021-10-15 19:34:16,679 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/data/52c7d7278/c3e0e2881c9b42fa977427558fb1c505 [2021-10-15 19:34:16,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:34:16,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:34:16,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:16,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:34:16,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:34:16,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:16" (1/1) ... [2021-10-15 19:34:16,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@179c6fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:16, skipping insertion in model container [2021-10-15 19:34:16,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:34:16" (1/1) ... [2021-10-15 19:34:16,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:34:16,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:34:16,993 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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2021-10-15 19:34:17,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:17,029 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:34:17,044 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_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/sv-benchmarks/c/nla-digbench-scaling/fermat1-ll_unwindbound10.c[535,548] [2021-10-15 19:34:17,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:34:17,074 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:34:17,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17 WrapperNode [2021-10-15 19:34:17,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:34:17,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:17,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:34:17,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:34:17,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:34:17,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:34:17,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:34:17,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:34:17,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:34:17,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:34:17,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:34:17,163 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:34:17,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (1/1) ... [2021-10-15 19:34:17,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:34:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:17,211 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:34:17,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:34:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:34:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:34:17,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:34:17,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:34:17,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:34:17,697 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-15 19:34:17,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:17 BoogieIcfgContainer [2021-10-15 19:34:17,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:34:17,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:34:17,714 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:34:17,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:34:17,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:34:16" (1/3) ... [2021-10-15 19:34:17,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0512ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:17, skipping insertion in model container [2021-10-15 19:34:17,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:34:17" (2/3) ... [2021-10-15 19:34:17,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0512ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:34:17, skipping insertion in model container [2021-10-15 19:34:17,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:17" (3/3) ... [2021-10-15 19:34:17,722 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_unwindbound10.c [2021-10-15 19:34:17,729 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:34:17,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-10-15 19:34:17,858 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:34:17,873 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 19:34:17,873 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-15 19:34:17,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 46 transitions, 92 flow [2021-10-15 19:34:17,945 INFO L129 PetriNetUnfolder]: 15/46 cut-off events. [2021-10-15 19:34:17,946 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:17,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 46 events. 15/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-10-15 19:34:17,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 46 transitions, 92 flow [2021-10-15 19:34:17,962 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 41 transitions, 82 flow [2021-10-15 19:34:17,978 INFO L129 PetriNetUnfolder]: 5/19 cut-off events. [2021-10-15 19:34:17,980 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:17,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:17,982 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:17,983 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-15 19:34:18,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:18,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661771695] [2021-10-15 19:34:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:18,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:18,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:18,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332499473] [2021-10-15 19:34:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:18,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:18,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:18,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:18,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:34:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:34:18,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:18,640 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 19:34:18,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:18,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661771695] [2021-10-15 19:34:18,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:18,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332499473] [2021-10-15 19:34:18,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332499473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:18,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:18,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731690094] [2021-10-15 19:34:18,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:18,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:18,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:18,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2021-10-15 19:34:18,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 41 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 19:34:18,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:18,686 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2021-10-15 19:34:18,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:25,536 INFO L129 PetriNetUnfolder]: 13/63 cut-off events. [2021-10-15 19:34:25,536 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:34:25,538 INFO L84 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 63 events. 13/63 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 100 event pairs, 0 based on Foata normal form. 14/67 useless extension candidates. Maximal degree in co-relation 6. Up to 21 conditions per place. [2021-10-15 19:34:25,541 INFO L132 encePairwiseOnDemand]: 30/46 looper letters, 32 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2021-10-15 19:34:25,541 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 178 flow [2021-10-15 19:34:25,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2021-10-15 19:34:25,558 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2021-10-15 19:34:25,559 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2021-10-15 19:34:25,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2021-10-15 19:34:25,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:25,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2021-10-15 19:34:25,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:25,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:25,576 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:25,579 INFO L186 Difference]: Start difference. First operand has 28 places, 41 transitions, 82 flow. Second operand 4 states and 118 transitions. [2021-10-15 19:34:25,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 178 flow [2021-10-15 19:34:25,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:25,588 INFO L242 Difference]: Finished difference. Result has 33 places, 38 transitions, 112 flow [2021-10-15 19:34:25,591 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=33, PETRI_TRANSITIONS=38} [2021-10-15 19:34:25,592 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2021-10-15 19:34:25,592 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 38 transitions, 112 flow [2021-10-15 19:34:25,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 19:34:25,593 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:25,593 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:25,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:25,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-15 19:34:25,815 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1507375428, now seen corresponding path program 1 times [2021-10-15 19:34:25,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:25,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363755973] [2021-10-15 19:34:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:25,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:25,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:25,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938154578] [2021-10-15 19:34:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:25,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:25,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:25,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:34:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:25,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:34:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:26,049 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 19:34:26,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:26,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363755973] [2021-10-15 19:34:26,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:26,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938154578] [2021-10-15 19:34:26,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938154578] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:26,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:26,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:34:26,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181178605] [2021-10-15 19:34:26,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:26,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:26,075 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:26,076 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 38 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 19:34:26,076 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:26,076 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:26,076 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:26,142 INFO L129 PetriNetUnfolder]: 13/65 cut-off events. [2021-10-15 19:34:26,142 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:34:26,143 INFO L84 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 65 events. 13/65 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 124 event pairs, 0 based on Foata normal form. 1/60 useless extension candidates. Maximal degree in co-relation 39. Up to 16 conditions per place. [2021-10-15 19:34:26,144 INFO L132 encePairwiseOnDemand]: 42/46 looper letters, 7 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2021-10-15 19:34:26,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 140 flow [2021-10-15 19:34:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2021-10-15 19:34:26,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2021-10-15 19:34:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2021-10-15 19:34:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2021-10-15 19:34:26,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:26,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2021-10-15 19:34:26,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,153 INFO L186 Difference]: Start difference. First operand has 33 places, 38 transitions, 112 flow. Second operand 4 states and 130 transitions. [2021-10-15 19:34:26,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 140 flow [2021-10-15 19:34:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:26,158 INFO L242 Difference]: Finished difference. Result has 37 places, 40 transitions, 134 flow [2021-10-15 19:34:26,159 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=37, PETRI_TRANSITIONS=40} [2021-10-15 19:34:26,160 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2021-10-15 19:34:26,160 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 40 transitions, 134 flow [2021-10-15 19:34:26,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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 19:34:26,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:26,161 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:26,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:26,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:26,387 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:26,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1189409771, now seen corresponding path program 1 times [2021-10-15 19:34:26,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:26,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215822954] [2021-10-15 19:34:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:26,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:26,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:26,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212910467] [2021-10-15 19:34:26,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:26,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:26,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:26,408 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:26,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:34:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:34:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:26,679 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 19:34:26,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:26,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215822954] [2021-10-15 19:34:26,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:26,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212910467] [2021-10-15 19:34:26,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212910467] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:26,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:26,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:34:26,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26622992] [2021-10-15 19:34:26,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:34:26,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:26,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:34:26,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:34:26,685 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2021-10-15 19:34:26,686 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 40 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,686 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:26,687 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2021-10-15 19:34:26,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:26,974 INFO L129 PetriNetUnfolder]: 11/59 cut-off events. [2021-10-15 19:34:26,974 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-10-15 19:34:26,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 59 events. 11/59 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 4/59 useless extension candidates. Maximal degree in co-relation 111. Up to 25 conditions per place. [2021-10-15 19:34:26,976 INFO L132 encePairwiseOnDemand]: 38/46 looper letters, 18 selfloop transitions, 4 changer transitions 3/36 dead transitions. [2021-10-15 19:34:26,976 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 178 flow [2021-10-15 19:34:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:34:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:34:26,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2021-10-15 19:34:26,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.44782608695652176 [2021-10-15 19:34:26,993 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 103 transitions. [2021-10-15 19:34:26,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 103 transitions. [2021-10-15 19:34:26,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:26,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 103 transitions. [2021-10-15 19:34:26,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,996 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:26,996 INFO L186 Difference]: Start difference. First operand has 37 places, 40 transitions, 134 flow. Second operand 5 states and 103 transitions. [2021-10-15 19:34:26,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 178 flow [2021-10-15 19:34:26,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 36 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:34:27,000 INFO L242 Difference]: Finished difference. Result has 35 places, 33 transitions, 124 flow [2021-10-15 19:34:27,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=124, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2021-10-15 19:34:27,001 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 7 predicate places. [2021-10-15 19:34:27,001 INFO L470 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 124 flow [2021-10-15 19:34:27,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:27,002 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:27,002 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:27,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:27,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:27,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash -112841942, now seen corresponding path program 1 times [2021-10-15 19:34:27,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:27,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861782553] [2021-10-15 19:34:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:27,232 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:27,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137091633] [2021-10-15 19:34:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:27,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:27,239 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:27,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:34:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:34:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:27,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861782553] [2021-10-15 19:34:27,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:27,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137091633] [2021-10-15 19:34:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137091633] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:27,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:27,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:27,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827805604] [2021-10-15 19:34:27,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:34:27,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:27,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:34:27,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:34:27,448 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:27,448 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 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 19:34:27,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:27,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:27,449 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:27,487 INFO L129 PetriNetUnfolder]: 11/59 cut-off events. [2021-10-15 19:34:27,487 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:34:27,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 59 events. 11/59 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 0 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 110. Up to 14 conditions per place. [2021-10-15 19:34:27,489 INFO L132 encePairwiseOnDemand]: 41/46 looper letters, 7 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2021-10-15 19:34:27,490 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 154 flow [2021-10-15 19:34:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:34:27,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:34:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-10-15 19:34:27,502 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-10-15 19:34:27,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-10-15 19:34:27,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-10-15 19:34:27,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:27,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-10-15 19:34:27,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:27,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:27,507 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:27,507 INFO L186 Difference]: Start difference. First operand has 35 places, 33 transitions, 124 flow. Second operand 5 states and 161 transitions. [2021-10-15 19:34:27,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 154 flow [2021-10-15 19:34:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 35 transitions, 144 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 19:34:27,511 INFO L242 Difference]: Finished difference. Result has 36 places, 35 transitions, 140 flow [2021-10-15 19:34:27,511 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2021-10-15 19:34:27,512 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2021-10-15 19:34:27,512 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 140 flow [2021-10-15 19:34:27,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 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 19:34:27,513 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:27,513 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:27,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:27,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-15 19:34:27,735 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:27,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1045325853, now seen corresponding path program 1 times [2021-10-15 19:34:27,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:27,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804549032] [2021-10-15 19:34:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:27,750 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:27,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596475016] [2021-10-15 19:34:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:27,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:27,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:27,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:27,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:34:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:34:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:27,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:27,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804549032] [2021-10-15 19:34:27,996 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:27,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596475016] [2021-10-15 19:34:27,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596475016] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:27,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:27,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:34:27,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83636276] [2021-10-15 19:34:27,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:34:27,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:34:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:34:28,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:28,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:28,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:28,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:28,081 INFO L129 PetriNetUnfolder]: 12/65 cut-off events. [2021-10-15 19:34:28,082 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-10-15 19:34:28,083 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 65 events. 12/65 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/64 useless extension candidates. Maximal degree in co-relation 103. Up to 17 conditions per place. [2021-10-15 19:34:28,084 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2021-10-15 19:34:28,084 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 178 flow [2021-10-15 19:34:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:34:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:34:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2021-10-15 19:34:28,095 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6992753623188406 [2021-10-15 19:34:28,095 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 193 transitions. [2021-10-15 19:34:28,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 193 transitions. [2021-10-15 19:34:28,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:28,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 193 transitions. [2021-10-15 19:34:28,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,099 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 46.0) internal successors, (322), 7 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,099 INFO L186 Difference]: Start difference. First operand has 36 places, 35 transitions, 140 flow. Second operand 6 states and 193 transitions. [2021-10-15 19:34:28,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 178 flow [2021-10-15 19:34:28,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:34:28,106 INFO L242 Difference]: Finished difference. Result has 41 places, 38 transitions, 173 flow [2021-10-15 19:34:28,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2021-10-15 19:34:28,106 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 13 predicate places. [2021-10-15 19:34:28,107 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 173 flow [2021-10-15 19:34:28,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.166666666666668) internal successors, (187), 6 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:28,108 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:28,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-15 19:34:28,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:28,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:28,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:28,336 INFO L82 PathProgramCache]: Analyzing trace with hash -944107012, now seen corresponding path program 1 times [2021-10-15 19:34:28,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:28,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629232873] [2021-10-15 19:34:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:28,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:28,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:28,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103387946] [2021-10-15 19:34:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:28,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:28,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:28,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:34:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:28,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:34:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:28,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:28,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629232873] [2021-10-15 19:34:28,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:28,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103387946] [2021-10-15 19:34:28,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103387946] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:28,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:28,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691447239] [2021-10-15 19:34:28,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:28,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:28,637 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2021-10-15 19:34:28,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:28,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2021-10-15 19:34:28,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:28,742 INFO L129 PetriNetUnfolder]: 22/135 cut-off events. [2021-10-15 19:34:28,743 INFO L130 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2021-10-15 19:34:28,744 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 135 events. 22/135 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 336 event pairs, 0 based on Foata normal form. 2/133 useless extension candidates. Maximal degree in co-relation 198. Up to 22 conditions per place. [2021-10-15 19:34:28,745 INFO L132 encePairwiseOnDemand]: 41/46 looper letters, 26 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2021-10-15 19:34:28,756 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 287 flow [2021-10-15 19:34:28,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2021-10-15 19:34:28,759 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2021-10-15 19:34:28,759 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 130 transitions. [2021-10-15 19:34:28,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 130 transitions. [2021-10-15 19:34:28,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:28,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 130 transitions. [2021-10-15 19:34:28,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,763 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,763 INFO L186 Difference]: Start difference. First operand has 41 places, 38 transitions, 173 flow. Second operand 4 states and 130 transitions. [2021-10-15 19:34:28,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 287 flow [2021-10-15 19:34:28,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 278 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-10-15 19:34:28,769 INFO L242 Difference]: Finished difference. Result has 44 places, 43 transitions, 212 flow [2021-10-15 19:34:28,772 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2021-10-15 19:34:28,772 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 16 predicate places. [2021-10-15 19:34:28,773 INFO L470 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 212 flow [2021-10-15 19:34:28,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:28,773 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:28,774 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:28,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:29,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:29,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2135520830, now seen corresponding path program 1 times [2021-10-15 19:34:29,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:29,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61411703] [2021-10-15 19:34:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:29,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:29,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:29,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996130795] [2021-10-15 19:34:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:29,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:29,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:29,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:34:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:29,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:34:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:29,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:29,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61411703] [2021-10-15 19:34:29,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:29,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996130795] [2021-10-15 19:34:29,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996130795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:29,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:34:29,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500499167] [2021-10-15 19:34:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:34:29,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:34:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:34:29,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:29,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:29,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:29,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:29,378 INFO L129 PetriNetUnfolder]: 22/136 cut-off events. [2021-10-15 19:34:29,379 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2021-10-15 19:34:29,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 136 events. 22/136 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 343 event pairs, 0 based on Foata normal form. 1/137 useless extension candidates. Maximal degree in co-relation 223. Up to 32 conditions per place. [2021-10-15 19:34:29,385 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2021-10-15 19:34:29,385 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 244 flow [2021-10-15 19:34:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:34:29,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:34:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 224 transitions. [2021-10-15 19:34:29,388 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:29,388 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 224 transitions. [2021-10-15 19:34:29,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 224 transitions. [2021-10-15 19:34:29,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:29,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 224 transitions. [2021-10-15 19:34:29,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 32.0) internal successors, (224), 7 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,393 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,393 INFO L186 Difference]: Start difference. First operand has 44 places, 43 transitions, 212 flow. Second operand 7 states and 224 transitions. [2021-10-15 19:34:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 244 flow [2021-10-15 19:34:29,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 244 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:29,410 INFO L242 Difference]: Finished difference. Result has 51 places, 44 transitions, 236 flow [2021-10-15 19:34:29,410 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2021-10-15 19:34:29,411 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2021-10-15 19:34:29,411 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 236 flow [2021-10-15 19:34:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.5) internal successors, (189), 6 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,411 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:29,412 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:29,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:29,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-15 19:34:29,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:29,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:29,615 INFO L82 PathProgramCache]: Analyzing trace with hash -737251849, now seen corresponding path program 1 times [2021-10-15 19:34:29,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:29,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897553780] [2021-10-15 19:34:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:29,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:29,628 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:29,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294517442] [2021-10-15 19:34:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:29,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:29,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:29,643 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:29,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:34:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:34:29,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:29,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:29,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897553780] [2021-10-15 19:34:29,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:29,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294517442] [2021-10-15 19:34:29,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294517442] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:29,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:29,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:34:29,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540919777] [2021-10-15 19:34:29,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:34:29,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:34:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:29,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:29,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:29,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:29,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:29,981 INFO L129 PetriNetUnfolder]: 23/146 cut-off events. [2021-10-15 19:34:29,981 INFO L130 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2021-10-15 19:34:29,983 INFO L84 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 146 events. 23/146 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 377 event pairs, 0 based on Foata normal form. 2/148 useless extension candidates. Maximal degree in co-relation 266. Up to 37 conditions per place. [2021-10-15 19:34:29,984 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2021-10-15 19:34:29,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 282 flow [2021-10-15 19:34:29,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:34:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:34:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 256 transitions. [2021-10-15 19:34:29,993 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:29,993 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 256 transitions. [2021-10-15 19:34:29,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 256 transitions. [2021-10-15 19:34:29,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:29,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 256 transitions. [2021-10-15 19:34:29,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 32.0) internal successors, (256), 8 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,998 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 46.0) internal successors, (414), 9 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:29,998 INFO L186 Difference]: Start difference. First operand has 51 places, 44 transitions, 236 flow. Second operand 8 states and 256 transitions. [2021-10-15 19:34:29,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 282 flow [2021-10-15 19:34:30,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 268 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-10-15 19:34:30,003 INFO L242 Difference]: Finished difference. Result has 55 places, 47 transitions, 268 flow [2021-10-15 19:34:30,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2021-10-15 19:34:30,004 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 27 predicate places. [2021-10-15 19:34:30,005 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 268 flow [2021-10-15 19:34:30,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.142857142857142) internal successors, (218), 7 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:30,005 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:30,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:30,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:30,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1237732592, now seen corresponding path program 1 times [2021-10-15 19:34:30,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:30,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137494773] [2021-10-15 19:34:30,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:30,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:30,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:30,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305247771] [2021-10-15 19:34:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:30,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:30,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:30,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:34:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:30,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:34:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:30,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:30,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137494773] [2021-10-15 19:34:30,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:30,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305247771] [2021-10-15 19:34:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305247771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:30,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:30,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:34:30,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348108422] [2021-10-15 19:34:30,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:34:30,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:30,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:34:30,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:34:30,577 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:30,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 268 flow. Second operand has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:30,579 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:30,579 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:30,659 INFO L129 PetriNetUnfolder]: 27/164 cut-off events. [2021-10-15 19:34:30,660 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2021-10-15 19:34:30,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 164 events. 27/164 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 479 event pairs, 0 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 334. Up to 39 conditions per place. [2021-10-15 19:34:30,663 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 12 changer transitions 0/51 dead transitions. [2021-10-15 19:34:30,663 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 328 flow [2021-10-15 19:34:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:34:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:34:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 289 transitions. [2021-10-15 19:34:30,666 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6980676328502415 [2021-10-15 19:34:30,666 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 289 transitions. [2021-10-15 19:34:30,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 289 transitions. [2021-10-15 19:34:30,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:30,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 289 transitions. [2021-10-15 19:34:30,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 32.111111111111114) internal successors, (289), 9 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,671 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,671 INFO L186 Difference]: Start difference. First operand has 55 places, 47 transitions, 268 flow. Second operand 9 states and 289 transitions. [2021-10-15 19:34:30,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 328 flow [2021-10-15 19:34:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 51 transitions, 308 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-10-15 19:34:30,677 INFO L242 Difference]: Finished difference. Result has 60 places, 51 transitions, 311 flow [2021-10-15 19:34:30,677 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=311, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2021-10-15 19:34:30,677 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2021-10-15 19:34:30,678 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 311 flow [2021-10-15 19:34:30,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:30,678 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:30,679 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:30,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:30,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:30,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:30,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:30,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1841895250, now seen corresponding path program 2 times [2021-10-15 19:34:30,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:30,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232607002] [2021-10-15 19:34:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:30,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:30,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:30,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962372940] [2021-10-15 19:34:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:30,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:30,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:30,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:30,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:34:31,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:31,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:34:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:31,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:31,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232607002] [2021-10-15 19:34:31,375 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:31,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962372940] [2021-10-15 19:34:31,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962372940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:31,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:31,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:34:31,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454034800] [2021-10-15 19:34:31,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:34:31,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:31,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:34:31,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:31,378 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:31,379 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 311 flow. Second operand has 7 states, 7 states have (on average 31.571428571428573) internal successors, (221), 7 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,379 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:31,379 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:31,380 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:31,464 INFO L129 PetriNetUnfolder]: 26/163 cut-off events. [2021-10-15 19:34:31,465 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2021-10-15 19:34:31,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 163 events. 26/163 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 477 event pairs, 0 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 365. Up to 38 conditions per place. [2021-10-15 19:34:31,467 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 10 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2021-10-15 19:34:31,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 52 transitions, 357 flow [2021-10-15 19:34:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:34:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:34:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 287 transitions. [2021-10-15 19:34:31,474 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6932367149758454 [2021-10-15 19:34:31,474 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 287 transitions. [2021-10-15 19:34:31,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 287 transitions. [2021-10-15 19:34:31,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:31,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 287 transitions. [2021-10-15 19:34:31,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 31.88888888888889) internal successors, (287), 9 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,478 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 46.0) internal successors, (460), 10 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,478 INFO L186 Difference]: Start difference. First operand has 60 places, 51 transitions, 311 flow. Second operand 9 states and 287 transitions. [2021-10-15 19:34:31,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 52 transitions, 357 flow [2021-10-15 19:34:31,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 326 flow, removed 7 selfloop flow, removed 6 redundant places. [2021-10-15 19:34:31,486 INFO L242 Difference]: Finished difference. Result has 63 places, 52 transitions, 312 flow [2021-10-15 19:34:31,487 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=312, PETRI_PLACES=63, PETRI_TRANSITIONS=52} [2021-10-15 19:34:31,488 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 35 predicate places. [2021-10-15 19:34:31,488 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 52 transitions, 312 flow [2021-10-15 19:34:31,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.571428571428573) internal successors, (221), 7 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:31,488 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:31,489 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:31,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:31,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:34:31,695 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:31,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:31,696 INFO L82 PathProgramCache]: Analyzing trace with hash 556407307, now seen corresponding path program 2 times [2021-10-15 19:34:31,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:31,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457224682] [2021-10-15 19:34:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:31,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:31,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:31,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022773918] [2021-10-15 19:34:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:31,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:31,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:31,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:31,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:34:32,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:32,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:32,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:34:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:32,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:32,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457224682] [2021-10-15 19:34:32,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:32,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022773918] [2021-10-15 19:34:32,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022773918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:32,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:32,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:34:32,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098101170] [2021-10-15 19:34:32,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:34:32,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:34:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:34:32,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:32,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 52 transitions, 312 flow. Second operand has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:32,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:32,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:32,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:32,329 INFO L129 PetriNetUnfolder]: 26/165 cut-off events. [2021-10-15 19:34:32,330 INFO L130 PetriNetUnfolder]: For 282/282 co-relation queries the response was YES. [2021-10-15 19:34:32,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 165 events. 26/165 cut-off events. For 282/282 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 500 event pairs, 0 based on Foata normal form. 2/167 useless extension candidates. Maximal degree in co-relation 375. Up to 39 conditions per place. [2021-10-15 19:34:32,332 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 13 changer transitions 0/53 dead transitions. [2021-10-15 19:34:32,333 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 53 transitions, 358 flow [2021-10-15 19:34:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:34:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:34:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 320 transitions. [2021-10-15 19:34:32,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:32,336 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 320 transitions. [2021-10-15 19:34:32,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 320 transitions. [2021-10-15 19:34:32,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:32,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 320 transitions. [2021-10-15 19:34:32,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 32.0) internal successors, (320), 10 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:32,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:32,340 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 46.0) internal successors, (506), 11 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:32,341 INFO L186 Difference]: Start difference. First operand has 63 places, 52 transitions, 312 flow. Second operand 10 states and 320 transitions. [2021-10-15 19:34:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 53 transitions, 358 flow [2021-10-15 19:34:32,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 340 flow, removed 2 selfloop flow, removed 6 redundant places. [2021-10-15 19:34:32,347 INFO L242 Difference]: Finished difference. Result has 67 places, 53 transitions, 332 flow [2021-10-15 19:34:32,347 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2021-10-15 19:34:32,348 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 39 predicate places. [2021-10-15 19:34:32,348 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 332 flow [2021-10-15 19:34:32,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.125) internal successors, (249), 8 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:32,348 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:32,349 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:32,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:32,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:32,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:32,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 723167780, now seen corresponding path program 2 times [2021-10-15 19:34:32,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:32,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724745568] [2021-10-15 19:34:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:32,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:32,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:32,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148547047] [2021-10-15 19:34:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:32,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:32,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:32,588 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:32,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:34:32,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:32,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:32,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:34:32,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:33,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:33,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724745568] [2021-10-15 19:34:33,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148547047] [2021-10-15 19:34:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148547047] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:33,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:33,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:34:33,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907662587] [2021-10-15 19:34:33,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:34:33,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:34:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:34:33,060 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:33,061 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:33,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:33,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:33,150 INFO L129 PetriNetUnfolder]: 30/189 cut-off events. [2021-10-15 19:34:33,151 INFO L130 PetriNetUnfolder]: For 411/411 co-relation queries the response was YES. [2021-10-15 19:34:33,152 INFO L84 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 189 events. 30/189 cut-off events. For 411/411 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 662 event pairs, 0 based on Foata normal form. 2/191 useless extension candidates. Maximal degree in co-relation 463. Up to 41 conditions per place. [2021-10-15 19:34:33,154 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2021-10-15 19:34:33,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 57 transitions, 408 flow [2021-10-15 19:34:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:34:33,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:34:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 353 transitions. [2021-10-15 19:34:33,157 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6976284584980237 [2021-10-15 19:34:33,157 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 353 transitions. [2021-10-15 19:34:33,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 353 transitions. [2021-10-15 19:34:33,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:33,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 353 transitions. [2021-10-15 19:34:33,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 32.09090909090909) internal successors, (353), 11 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,162 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,162 INFO L186 Difference]: Start difference. First operand has 67 places, 53 transitions, 332 flow. Second operand 11 states and 353 transitions. [2021-10-15 19:34:33,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 57 transitions, 408 flow [2021-10-15 19:34:33,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 57 transitions, 380 flow, removed 2 selfloop flow, removed 8 redundant places. [2021-10-15 19:34:33,168 INFO L242 Difference]: Finished difference. Result has 71 places, 57 transitions, 384 flow [2021-10-15 19:34:33,169 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=384, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2021-10-15 19:34:33,169 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 43 predicate places. [2021-10-15 19:34:33,169 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 384 flow [2021-10-15 19:34:33,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:33,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:33,170 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:33,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-15 19:34:33,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:33,375 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -492171674, now seen corresponding path program 3 times [2021-10-15 19:34:33,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:33,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004554315] [2021-10-15 19:34:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:33,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:33,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:33,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926420244] [2021-10-15 19:34:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:33,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:33,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:33,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:34:33,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 19:34:33,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:34:33,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:34,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:34,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004554315] [2021-10-15 19:34:34,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:34,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926420244] [2021-10-15 19:34:34,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926420244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:34,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:34,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:34:34,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864113883] [2021-10-15 19:34:34,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:34:34,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:34,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:34:34,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:34:34,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:34,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 384 flow. Second operand has 8 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:34,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:34,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:34,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:34,146 INFO L129 PetriNetUnfolder]: 29/188 cut-off events. [2021-10-15 19:34:34,147 INFO L130 PetriNetUnfolder]: For 539/539 co-relation queries the response was YES. [2021-10-15 19:34:34,148 INFO L84 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 188 events. 29/188 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 664 event pairs, 0 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 496. Up to 42 conditions per place. [2021-10-15 19:34:34,150 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 10 selfloop transitions, 14 changer transitions 0/58 dead transitions. [2021-10-15 19:34:34,150 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 58 transitions, 440 flow [2021-10-15 19:34:34,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:34:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:34:34,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 351 transitions. [2021-10-15 19:34:34,153 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6936758893280632 [2021-10-15 19:34:34,153 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 351 transitions. [2021-10-15 19:34:34,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 351 transitions. [2021-10-15 19:34:34,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:34,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 351 transitions. [2021-10-15 19:34:34,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 31.90909090909091) internal successors, (351), 11 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 19:34:34,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:34,159 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 46.0) internal successors, (552), 12 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:34,159 INFO L186 Difference]: Start difference. First operand has 71 places, 57 transitions, 384 flow. Second operand 11 states and 351 transitions. [2021-10-15 19:34:34,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 58 transitions, 440 flow [2021-10-15 19:34:34,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 394 flow, removed 11 selfloop flow, removed 8 redundant places. [2021-10-15 19:34:34,167 INFO L242 Difference]: Finished difference. Result has 74 places, 58 transitions, 380 flow [2021-10-15 19:34:34,168 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=380, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2021-10-15 19:34:34,168 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 46 predicate places. [2021-10-15 19:34:34,168 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 380 flow [2021-10-15 19:34:34,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.625) internal successors, (253), 8 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:34,169 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:34,169 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:34,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:34,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:34:34,375 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:34,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -508978145, now seen corresponding path program 3 times [2021-10-15 19:34:34,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:34,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994868350] [2021-10-15 19:34:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:34,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:34,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:34,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259519651] [2021-10-15 19:34:34,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:34,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:34,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:34,390 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:34,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:34:35,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 19:34:35,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:34:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:35,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:35,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994868350] [2021-10-15 19:34:35,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:35,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259519651] [2021-10-15 19:34:35,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259519651] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:35,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:35,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:34:35,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086839047] [2021-10-15 19:34:35,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:34:35,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:34:35,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:34:35,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:35,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 380 flow. Second operand has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:35,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:35,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:35,320 INFO L129 PetriNetUnfolder]: 29/190 cut-off events. [2021-10-15 19:34:35,321 INFO L130 PetriNetUnfolder]: For 501/501 co-relation queries the response was YES. [2021-10-15 19:34:35,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 190 events. 29/190 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 677 event pairs, 0 based on Foata normal form. 2/192 useless extension candidates. Maximal degree in co-relation 500. Up to 41 conditions per place. [2021-10-15 19:34:35,324 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 17 changer transitions 0/59 dead transitions. [2021-10-15 19:34:35,325 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 59 transitions, 436 flow [2021-10-15 19:34:35,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:34:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:34:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 384 transitions. [2021-10-15 19:34:35,328 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:35,328 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 384 transitions. [2021-10-15 19:34:35,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 384 transitions. [2021-10-15 19:34:35,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:35,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 384 transitions. [2021-10-15 19:34:35,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 32.0) internal successors, (384), 12 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,336 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 46.0) internal successors, (598), 13 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,336 INFO L186 Difference]: Start difference. First operand has 74 places, 58 transitions, 380 flow. Second operand 12 states and 384 transitions. [2021-10-15 19:34:35,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 59 transitions, 436 flow [2021-10-15 19:34:35,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 59 transitions, 409 flow, removed 3 selfloop flow, removed 8 redundant places. [2021-10-15 19:34:35,345 INFO L242 Difference]: Finished difference. Result has 78 places, 59 transitions, 401 flow [2021-10-15 19:34:35,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=401, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2021-10-15 19:34:35,346 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 50 predicate places. [2021-10-15 19:34:35,346 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 401 flow [2021-10-15 19:34:35,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.11111111111111) internal successors, (280), 9 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:35,347 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:35,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:35,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:35,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:35,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1554056062, now seen corresponding path program 1 times [2021-10-15 19:34:35,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:35,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878612569] [2021-10-15 19:34:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:35,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:35,570 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:35,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587278256] [2021-10-15 19:34:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:35,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:35,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:35,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:34:35,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:35,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:34:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:34:35,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:35,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878612569] [2021-10-15 19:34:35,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:35,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587278256] [2021-10-15 19:34:35,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587278256] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:35,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:35,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:35,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005856072] [2021-10-15 19:34:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:35,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:35,962 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2021-10-15 19:34:35,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:35,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:35,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2021-10-15 19:34:35,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:36,065 INFO L129 PetriNetUnfolder]: 32/244 cut-off events. [2021-10-15 19:34:36,065 INFO L130 PetriNetUnfolder]: For 763/763 co-relation queries the response was YES. [2021-10-15 19:34:36,067 INFO L84 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 244 events. 32/244 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 954 event pairs, 0 based on Foata normal form. 4/248 useless extension candidates. Maximal degree in co-relation 678. Up to 61 conditions per place. [2021-10-15 19:34:36,069 INFO L132 encePairwiseOnDemand]: 41/46 looper letters, 38 selfloop transitions, 6 changer transitions 3/76 dead transitions. [2021-10-15 19:34:36,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 607 flow [2021-10-15 19:34:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:36,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2021-10-15 19:34:36,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2021-10-15 19:34:36,071 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 124 transitions. [2021-10-15 19:34:36,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 124 transitions. [2021-10-15 19:34:36,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:36,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 124 transitions. [2021-10-15 19:34:36,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.0) internal successors, (124), 4 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 19:34:36,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,074 INFO L186 Difference]: Start difference. First operand has 78 places, 59 transitions, 401 flow. Second operand 4 states and 124 transitions. [2021-10-15 19:34:36,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 607 flow [2021-10-15 19:34:36,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 565 flow, removed 6 selfloop flow, removed 9 redundant places. [2021-10-15 19:34:36,085 INFO L242 Difference]: Finished difference. Result has 75 places, 64 transitions, 433 flow [2021-10-15 19:34:36,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=433, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2021-10-15 19:34:36,086 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 47 predicate places. [2021-10-15 19:34:36,087 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 433 flow [2021-10-15 19:34:36,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:36,087 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:36,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:36,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:34:36,306 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 122158014, now seen corresponding path program 1 times [2021-10-15 19:34:36,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:36,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027300967] [2021-10-15 19:34:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:36,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:36,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:36,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767655254] [2021-10-15 19:34:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:36,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:36,327 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:36,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:34:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:34:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:36,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:36,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027300967] [2021-10-15 19:34:36,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:36,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767655254] [2021-10-15 19:34:36,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767655254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:36,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:36,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:34:36,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802211190] [2021-10-15 19:34:36,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:34:36,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:34:36,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:34:36,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:36,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 433 flow. Second operand has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,762 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:36,762 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:36,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:36,894 INFO L129 PetriNetUnfolder]: 32/246 cut-off events. [2021-10-15 19:34:36,895 INFO L130 PetriNetUnfolder]: For 783/783 co-relation queries the response was YES. [2021-10-15 19:34:36,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 246 events. 32/246 cut-off events. For 783/783 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 975 event pairs, 0 based on Foata normal form. 2/248 useless extension candidates. Maximal degree in co-relation 689. Up to 47 conditions per place. [2021-10-15 19:34:36,899 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 19 changer transitions 0/66 dead transitions. [2021-10-15 19:34:36,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 66 transitions, 503 flow [2021-10-15 19:34:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:34:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:34:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 415 transitions. [2021-10-15 19:34:36,903 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6939799331103679 [2021-10-15 19:34:36,903 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 415 transitions. [2021-10-15 19:34:36,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 415 transitions. [2021-10-15 19:34:36,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:36,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 415 transitions. [2021-10-15 19:34:36,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 31.923076923076923) internal successors, (415), 13 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,909 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,909 INFO L186 Difference]: Start difference. First operand has 75 places, 64 transitions, 433 flow. Second operand 13 states and 415 transitions. [2021-10-15 19:34:36,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 66 transitions, 503 flow [2021-10-15 19:34:36,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 66 transitions, 503 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:36,920 INFO L242 Difference]: Finished difference. Result has 88 places, 66 transitions, 498 flow [2021-10-15 19:34:36,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=498, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2021-10-15 19:34:36,921 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 60 predicate places. [2021-10-15 19:34:36,921 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 498 flow [2021-10-15 19:34:36,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 31.333333333333332) internal successors, (282), 9 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:36,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:36,922 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:36,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:37,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:34:37,151 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -910035144, now seen corresponding path program 3 times [2021-10-15 19:34:37,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:37,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163030677] [2021-10-15 19:34:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:37,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:37,160 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:37,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216017894] [2021-10-15 19:34:37,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:37,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:37,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:37,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:34:37,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:34:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:37,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:34:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:34:37,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:37,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163030677] [2021-10-15 19:34:37,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:37,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216017894] [2021-10-15 19:34:37,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216017894] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:37,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:37,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:34:37,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46780050] [2021-10-15 19:34:37,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:34:37,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:34:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:34:37,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2021-10-15 19:34:37,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 498 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:37,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:37,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2021-10-15 19:34:37,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:40,291 INFO L129 PetriNetUnfolder]: 32/242 cut-off events. [2021-10-15 19:34:40,306 INFO L130 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2021-10-15 19:34:40,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 242 events. 32/242 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 951 event pairs, 0 based on Foata normal form. 2/244 useless extension candidates. Maximal degree in co-relation 795. Up to 80 conditions per place. [2021-10-15 19:34:40,310 INFO L132 encePairwiseOnDemand]: 39/46 looper letters, 47 selfloop transitions, 11 changer transitions 6/86 dead transitions. [2021-10-15 19:34:40,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 86 transitions, 736 flow [2021-10-15 19:34:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:34:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:34:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2021-10-15 19:34:40,313 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4503105590062112 [2021-10-15 19:34:40,313 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 145 transitions. [2021-10-15 19:34:40,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 145 transitions. [2021-10-15 19:34:40,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:40,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 145 transitions. [2021-10-15 19:34:40,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:40,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:40,316 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 46.0) internal successors, (368), 8 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:40,330 INFO L186 Difference]: Start difference. First operand has 88 places, 66 transitions, 498 flow. Second operand 7 states and 145 transitions. [2021-10-15 19:34:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 86 transitions, 736 flow [2021-10-15 19:34:40,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 699 flow, removed 4 selfloop flow, removed 10 redundant places. [2021-10-15 19:34:40,342 INFO L242 Difference]: Finished difference. Result has 85 places, 67 transitions, 487 flow [2021-10-15 19:34:40,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=487, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2021-10-15 19:34:40,343 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 57 predicate places. [2021-10-15 19:34:40,343 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 487 flow [2021-10-15 19:34:40,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:40,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:40,344 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:40,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:40,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:34:40,558 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:40,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:40,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1577398136, now seen corresponding path program 1 times [2021-10-15 19:34:40,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:40,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992985057] [2021-10-15 19:34:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:40,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:40,577 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:40,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18936797] [2021-10-15 19:34:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:40,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:40,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:40,586 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:40,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:34:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:34:40,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:41,075 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 19:34:41,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:41,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992985057] [2021-10-15 19:34:41,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:41,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18936797] [2021-10-15 19:34:41,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18936797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:41,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:41,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:34:41,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683231952] [2021-10-15 19:34:41,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:34:41,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:41,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:34:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:34:41,082 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:41,083 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 487 flow. Second operand has 10 states, 10 states have (on average 31.1) internal successors, (311), 10 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:41,084 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:41,084 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:41,216 INFO L129 PetriNetUnfolder]: 35/252 cut-off events. [2021-10-15 19:34:41,217 INFO L130 PetriNetUnfolder]: For 1022/1022 co-relation queries the response was YES. [2021-10-15 19:34:41,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 252 events. 35/252 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1060 event pairs, 0 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 931. Up to 52 conditions per place. [2021-10-15 19:34:41,221 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 20 changer transitions 0/71 dead transitions. [2021-10-15 19:34:41,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 71 transitions, 579 flow [2021-10-15 19:34:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:34:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:34:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 417 transitions. [2021-10-15 19:34:41,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.697324414715719 [2021-10-15 19:34:41,226 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 417 transitions. [2021-10-15 19:34:41,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 417 transitions. [2021-10-15 19:34:41,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:41,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 417 transitions. [2021-10-15 19:34:41,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 32.07692307692308) internal successors, (417), 13 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,236 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 46.0) internal successors, (644), 14 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,237 INFO L186 Difference]: Start difference. First operand has 85 places, 67 transitions, 487 flow. Second operand 13 states and 417 transitions. [2021-10-15 19:34:41,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 71 transitions, 579 flow [2021-10-15 19:34:41,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 71 transitions, 558 flow, removed 3 selfloop flow, removed 6 redundant places. [2021-10-15 19:34:41,249 INFO L242 Difference]: Finished difference. Result has 91 places, 71 transitions, 562 flow [2021-10-15 19:34:41,250 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=562, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2021-10-15 19:34:41,250 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 63 predicate places. [2021-10-15 19:34:41,250 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 562 flow [2021-10-15 19:34:41,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.1) internal successors, (311), 10 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,251 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:41,251 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:41,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:41,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:34:41,475 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:41,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1451332471, now seen corresponding path program 1 times [2021-10-15 19:34:41,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:41,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638090466] [2021-10-15 19:34:41,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:41,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:41,485 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:41,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639196070] [2021-10-15 19:34:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:41,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:41,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:41,487 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:41,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:34:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:34:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:34:41,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:41,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638090466] [2021-10-15 19:34:41,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:41,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639196070] [2021-10-15 19:34:41,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639196070] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:34:41,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:34:41,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:34:41,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779530519] [2021-10-15 19:34:41,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:41,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:41,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 46 [2021-10-15 19:34:41,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 562 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:41,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 46 [2021-10-15 19:34:41,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:41,982 INFO L129 PetriNetUnfolder]: 38/318 cut-off events. [2021-10-15 19:34:41,982 INFO L130 PetriNetUnfolder]: For 1613/1613 co-relation queries the response was YES. [2021-10-15 19:34:41,984 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1289 conditions, 318 events. 38/318 cut-off events. For 1613/1613 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1417 event pairs, 0 based on Foata normal form. 5/323 useless extension candidates. Maximal degree in co-relation 1032. Up to 90 conditions per place. [2021-10-15 19:34:41,987 INFO L132 encePairwiseOnDemand]: 41/46 looper letters, 43 selfloop transitions, 5 changer transitions 0/82 dead transitions. [2021-10-15 19:34:41,987 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 748 flow [2021-10-15 19:34:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:34:41,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:34:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2021-10-15 19:34:41,989 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2021-10-15 19:34:41,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 124 transitions. [2021-10-15 19:34:41,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 124 transitions. [2021-10-15 19:34:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 124 transitions. [2021-10-15 19:34:41,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.0) internal successors, (124), 4 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 19:34:41,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,992 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:41,992 INFO L186 Difference]: Start difference. First operand has 91 places, 71 transitions, 562 flow. Second operand 4 states and 124 transitions. [2021-10-15 19:34:41,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 748 flow [2021-10-15 19:34:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 82 transitions, 686 flow, removed 15 selfloop flow, removed 10 redundant places. [2021-10-15 19:34:42,008 INFO L242 Difference]: Finished difference. Result has 87 places, 76 transitions, 568 flow [2021-10-15 19:34:42,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=568, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2021-10-15 19:34:42,010 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 59 predicate places. [2021-10-15 19:34:42,011 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 568 flow [2021-10-15 19:34:42,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:42,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:42,012 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:42,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:42,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:42,231 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:42,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1941042227, now seen corresponding path program 4 times [2021-10-15 19:34:42,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:42,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453932807] [2021-10-15 19:34:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:42,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:42,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:42,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639947359] [2021-10-15 19:34:42,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:34:42,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:42,261 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:42,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:34:42,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:34:42,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:34:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:42,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:42,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:42,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453932807] [2021-10-15 19:34:42,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:42,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639947359] [2021-10-15 19:34:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639947359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:42,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:42,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:34:42,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327157270] [2021-10-15 19:34:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:34:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:34:42,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:34:42,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:42,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 568 flow. Second operand has 10 states, 10 states have (on average 31.1) internal successors, (311), 10 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:42,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:42,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:42,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:42,984 INFO L129 PetriNetUnfolder]: 38/321 cut-off events. [2021-10-15 19:34:42,985 INFO L130 PetriNetUnfolder]: For 1458/1458 co-relation queries the response was YES. [2021-10-15 19:34:42,987 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 321 events. 38/321 cut-off events. For 1458/1458 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1344 event pairs, 0 based on Foata normal form. 3/324 useless extension candidates. Maximal degree in co-relation 1017. Up to 65 conditions per place. [2021-10-15 19:34:42,989 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 21 changer transitions 0/77 dead transitions. [2021-10-15 19:34:42,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 77 transitions, 634 flow [2021-10-15 19:34:42,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:34:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:34:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 448 transitions. [2021-10-15 19:34:42,992 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:42,993 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 448 transitions. [2021-10-15 19:34:42,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 448 transitions. [2021-10-15 19:34:42,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:42,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 448 transitions. [2021-10-15 19:34:42,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 32.0) internal successors, (448), 14 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:42,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:42,998 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 46.0) internal successors, (690), 15 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:42,998 INFO L186 Difference]: Start difference. First operand has 87 places, 76 transitions, 568 flow. Second operand 14 states and 448 transitions. [2021-10-15 19:34:42,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 77 transitions, 634 flow [2021-10-15 19:34:43,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 77 transitions, 628 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:43,030 INFO L242 Difference]: Finished difference. Result has 101 places, 77 transitions, 620 flow [2021-10-15 19:34:43,030 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=620, PETRI_PLACES=101, PETRI_TRANSITIONS=77} [2021-10-15 19:34:43,031 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 73 predicate places. [2021-10-15 19:34:43,031 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 77 transitions, 620 flow [2021-10-15 19:34:43,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.1) internal successors, (311), 10 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,031 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:43,032 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:43,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:43,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:43,246 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash 949657298, now seen corresponding path program 1 times [2021-10-15 19:34:43,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:43,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638135872] [2021-10-15 19:34:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:43,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:43,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:43,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145285275] [2021-10-15 19:34:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:43,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:43,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:43,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:43,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:34:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:34:43,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 19:34:43,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:43,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638135872] [2021-10-15 19:34:43,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:43,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145285275] [2021-10-15 19:34:43,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145285275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:43,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:43,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:34:43,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675065850] [2021-10-15 19:34:43,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:34:43,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:34:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:34:43,680 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 46 [2021-10-15 19:34:43,680 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 77 transitions, 620 flow. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:43,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 46 [2021-10-15 19:34:43,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:43,884 INFO L129 PetriNetUnfolder]: 44/395 cut-off events. [2021-10-15 19:34:43,885 INFO L130 PetriNetUnfolder]: For 2378/2378 co-relation queries the response was YES. [2021-10-15 19:34:43,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1702 conditions, 395 events. 44/395 cut-off events. For 2378/2378 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1977 event pairs, 0 based on Foata normal form. 6/401 useless extension candidates. Maximal degree in co-relation 1371. Up to 58 conditions per place. [2021-10-15 19:34:43,891 INFO L132 encePairwiseOnDemand]: 42/46 looper letters, 76 selfloop transitions, 8 changer transitions 1/115 dead transitions. [2021-10-15 19:34:43,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 115 transitions, 1113 flow [2021-10-15 19:34:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:34:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:34:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2021-10-15 19:34:43,894 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-10-15 19:34:43,894 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 161 transitions. [2021-10-15 19:34:43,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 161 transitions. [2021-10-15 19:34:43,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:43,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 161 transitions. [2021-10-15 19:34:43,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,897 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,897 INFO L186 Difference]: Start difference. First operand has 101 places, 77 transitions, 620 flow. Second operand 5 states and 161 transitions. [2021-10-15 19:34:43,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 115 transitions, 1113 flow [2021-10-15 19:34:43,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 115 transitions, 1057 flow, removed 8 selfloop flow, removed 11 redundant places. [2021-10-15 19:34:43,919 INFO L242 Difference]: Finished difference. Result has 95 places, 81 transitions, 656 flow [2021-10-15 19:34:43,919 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=95, PETRI_TRANSITIONS=81} [2021-10-15 19:34:43,919 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 67 predicate places. [2021-10-15 19:34:43,920 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 81 transitions, 656 flow [2021-10-15 19:34:43,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:43,921 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:43,921 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:43,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:44,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:44,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash 537451730, now seen corresponding path program 2 times [2021-10-15 19:34:44,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:44,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965931580] [2021-10-15 19:34:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:44,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:44,149 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:44,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9182001] [2021-10-15 19:34:44,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:44,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:44,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:44,151 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:44,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:34:44,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:44,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:44,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:34:44,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:44,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:44,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965931580] [2021-10-15 19:34:44,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:44,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9182001] [2021-10-15 19:34:44,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9182001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:44,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:44,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:34:44,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809899243] [2021-10-15 19:34:44,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:34:44,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:34:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:34:44,674 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:44,674 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 81 transitions, 656 flow. Second operand has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:44,675 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:44,675 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:44,675 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:44,864 INFO L129 PetriNetUnfolder]: 44/398 cut-off events. [2021-10-15 19:34:44,864 INFO L130 PetriNetUnfolder]: For 2220/2220 co-relation queries the response was YES. [2021-10-15 19:34:44,867 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1662 conditions, 398 events. 44/398 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1988 event pairs, 0 based on Foata normal form. 3/401 useless extension candidates. Maximal degree in co-relation 1352. Up to 81 conditions per place. [2021-10-15 19:34:44,870 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2021-10-15 19:34:44,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 83 transitions, 740 flow [2021-10-15 19:34:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:34:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 19:34:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 479 transitions. [2021-10-15 19:34:44,873 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6942028985507246 [2021-10-15 19:34:44,873 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 479 transitions. [2021-10-15 19:34:44,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 479 transitions. [2021-10-15 19:34:44,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:44,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 479 transitions. [2021-10-15 19:34:44,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 31.933333333333334) internal successors, (479), 15 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:44,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:44,878 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:44,878 INFO L186 Difference]: Start difference. First operand has 95 places, 81 transitions, 656 flow. Second operand 15 states and 479 transitions. [2021-10-15 19:34:44,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 83 transitions, 740 flow [2021-10-15 19:34:44,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 83 transitions, 740 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:34:44,898 INFO L242 Difference]: Finished difference. Result has 110 places, 83 transitions, 735 flow [2021-10-15 19:34:44,898 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=735, PETRI_PLACES=110, PETRI_TRANSITIONS=83} [2021-10-15 19:34:44,898 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 82 predicate places. [2021-10-15 19:34:44,899 INFO L470 AbstractCegarLoop]: Abstraction has has 110 places, 83 transitions, 735 flow [2021-10-15 19:34:44,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:44,899 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:44,899 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:44,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:45,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 19:34:45,123 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1890069876, now seen corresponding path program 2 times [2021-10-15 19:34:45,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:45,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414699683] [2021-10-15 19:34:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:45,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:45,134 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:45,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599094514] [2021-10-15 19:34:45,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:45,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:45,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:45,137 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:45,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:34:45,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:45,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:34:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:45,642 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 19:34:45,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414699683] [2021-10-15 19:34:45,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599094514] [2021-10-15 19:34:45,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599094514] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:45,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:34:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149165614] [2021-10-15 19:34:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:34:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:34:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:34:45,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:45,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 83 transitions, 735 flow. Second operand has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:45,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:45,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:45,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:45,827 INFO L129 PetriNetUnfolder]: 48/430 cut-off events. [2021-10-15 19:34:45,828 INFO L130 PetriNetUnfolder]: For 2753/2753 co-relation queries the response was YES. [2021-10-15 19:34:45,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1891 conditions, 430 events. 48/430 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2259 event pairs, 0 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 1554. Up to 99 conditions per place. [2021-10-15 19:34:45,834 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2021-10-15 19:34:45,834 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 87 transitions, 843 flow [2021-10-15 19:34:45,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 19:34:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 19:34:45,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 481 transitions. [2021-10-15 19:34:45,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6971014492753623 [2021-10-15 19:34:45,838 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 481 transitions. [2021-10-15 19:34:45,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 481 transitions. [2021-10-15 19:34:45,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:45,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 481 transitions. [2021-10-15 19:34:45,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 32.06666666666667) internal successors, (481), 15 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:45,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:45,844 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 46.0) internal successors, (736), 16 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:45,845 INFO L186 Difference]: Start difference. First operand has 110 places, 83 transitions, 735 flow. Second operand 15 states and 481 transitions. [2021-10-15 19:34:45,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 87 transitions, 843 flow [2021-10-15 19:34:45,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 87 transitions, 793 flow, removed 6 selfloop flow, removed 12 redundant places. [2021-10-15 19:34:45,866 INFO L242 Difference]: Finished difference. Result has 114 places, 87 transitions, 797 flow [2021-10-15 19:34:45,867 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=797, PETRI_PLACES=114, PETRI_TRANSITIONS=87} [2021-10-15 19:34:45,867 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 86 predicate places. [2021-10-15 19:34:45,867 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 87 transitions, 797 flow [2021-10-15 19:34:45,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.09090909090909) internal successors, (342), 11 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:45,868 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:45,868 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:45,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:46,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 19:34:46,083 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:46,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:46,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1116635019, now seen corresponding path program 1 times [2021-10-15 19:34:46,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:46,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143402682] [2021-10-15 19:34:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:46,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:46,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:46,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768305056] [2021-10-15 19:34:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:46,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:46,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:46,098 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:46,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 19:34:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:34:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:34:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:46,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:46,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143402682] [2021-10-15 19:34:46,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:46,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768305056] [2021-10-15 19:34:46,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768305056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:46,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:46,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:34:46,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061401010] [2021-10-15 19:34:46,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:34:46,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:46,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:34:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:34:46,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:46,629 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 87 transitions, 797 flow. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:46,629 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:46,629 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:46,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:46,823 INFO L129 PetriNetUnfolder]: 48/434 cut-off events. [2021-10-15 19:34:46,824 INFO L130 PetriNetUnfolder]: For 3302/3302 co-relation queries the response was YES. [2021-10-15 19:34:46,827 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2023 conditions, 434 events. 48/434 cut-off events. For 3302/3302 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2176 event pairs, 0 based on Foata normal form. 4/438 useless extension candidates. Maximal degree in co-relation 1680. Up to 91 conditions per place. [2021-10-15 19:34:46,831 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 25 changer transitions 0/88 dead transitions. [2021-10-15 19:34:46,831 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 88 transitions, 873 flow [2021-10-15 19:34:46,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:34:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:34:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 512 transitions. [2021-10-15 19:34:46,834 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:46,834 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 512 transitions. [2021-10-15 19:34:46,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 512 transitions. [2021-10-15 19:34:46,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:46,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 512 transitions. [2021-10-15 19:34:46,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 32.0) internal successors, (512), 16 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:46,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:46,839 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 46.0) internal successors, (782), 17 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:46,840 INFO L186 Difference]: Start difference. First operand has 114 places, 87 transitions, 797 flow. Second operand 16 states and 512 transitions. [2021-10-15 19:34:46,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 88 transitions, 873 flow [2021-10-15 19:34:46,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 88 transitions, 795 flow, removed 19 selfloop flow, removed 12 redundant places. [2021-10-15 19:34:46,865 INFO L242 Difference]: Finished difference. Result has 118 places, 88 transitions, 787 flow [2021-10-15 19:34:46,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=719, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=787, PETRI_PLACES=118, PETRI_TRANSITIONS=88} [2021-10-15 19:34:46,866 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 90 predicate places. [2021-10-15 19:34:46,866 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 88 transitions, 787 flow [2021-10-15 19:34:46,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:46,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:46,867 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:46,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:47,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 19:34:47,094 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:47,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1795004390, now seen corresponding path program 3 times [2021-10-15 19:34:47,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:47,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308523517] [2021-10-15 19:34:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:47,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:47,104 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:47,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030403581] [2021-10-15 19:34:47,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:47,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:47,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:47,107 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:47,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 19:34:47,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 19:34:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:47,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:34:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:47,875 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:47,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:47,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308523517] [2021-10-15 19:34:47,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:47,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030403581] [2021-10-15 19:34:47,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030403581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:47,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:47,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:34:47,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487905230] [2021-10-15 19:34:47,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:34:47,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:47,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:34:47,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:34:47,878 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:47,879 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 88 transitions, 787 flow. Second operand has 11 states, 11 states have (on average 31.454545454545453) internal successors, (346), 11 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:47,879 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:47,879 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:47,879 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:48,094 INFO L129 PetriNetUnfolder]: 48/438 cut-off events. [2021-10-15 19:34:48,094 INFO L130 PetriNetUnfolder]: For 3356/3356 co-relation queries the response was YES. [2021-10-15 19:34:48,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2034 conditions, 438 events. 48/438 cut-off events. For 3356/3356 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2192 event pairs, 0 based on Foata normal form. 4/442 useless extension candidates. Maximal degree in co-relation 1689. Up to 83 conditions per place. [2021-10-15 19:34:48,101 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 29 changer transitions 0/90 dead transitions. [2021-10-15 19:34:48,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 90 transitions, 885 flow [2021-10-15 19:34:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:34:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:34:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 543 transitions. [2021-10-15 19:34:48,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6943734015345269 [2021-10-15 19:34:48,105 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 543 transitions. [2021-10-15 19:34:48,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 543 transitions. [2021-10-15 19:34:48,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:48,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 543 transitions. [2021-10-15 19:34:48,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 31.941176470588236) internal successors, (543), 17 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:48,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:48,110 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:48,111 INFO L186 Difference]: Start difference. First operand has 118 places, 88 transitions, 787 flow. Second operand 17 states and 543 transitions. [2021-10-15 19:34:48,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 90 transitions, 885 flow [2021-10-15 19:34:48,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 90 transitions, 833 flow, removed 5 selfloop flow, removed 13 redundant places. [2021-10-15 19:34:48,134 INFO L242 Difference]: Finished difference. Result has 122 places, 90 transitions, 828 flow [2021-10-15 19:34:48,135 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=828, PETRI_PLACES=122, PETRI_TRANSITIONS=90} [2021-10-15 19:34:48,135 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 94 predicate places. [2021-10-15 19:34:48,135 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 90 transitions, 828 flow [2021-10-15 19:34:48,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.454545454545453) internal successors, (346), 11 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:48,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:48,136 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:48,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 19:34:48,342 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1044722784, now seen corresponding path program 3 times [2021-10-15 19:34:48,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:48,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973069791] [2021-10-15 19:34:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:48,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:48,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:48,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674961454] [2021-10-15 19:34:48,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:48,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:48,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:48,357 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:48,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 19:34:48,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-15 19:34:48,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:34:48,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:49,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:49,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973069791] [2021-10-15 19:34:49,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:49,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674961454] [2021-10-15 19:34:49,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674961454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:49,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:49,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:34:49,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417101499] [2021-10-15 19:34:49,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:34:49,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:34:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:34:49,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:49,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 90 transitions, 828 flow. Second operand has 12 states, 12 states have (on average 31.083333333333332) internal successors, (373), 12 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:49,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:49,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:49,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:49,372 INFO L129 PetriNetUnfolder]: 51/473 cut-off events. [2021-10-15 19:34:49,372 INFO L130 PetriNetUnfolder]: For 3872/3872 co-relation queries the response was YES. [2021-10-15 19:34:49,375 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2238 conditions, 473 events. 51/473 cut-off events. For 3872/3872 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2499 event pairs, 0 based on Foata normal form. 2/475 useless extension candidates. Maximal degree in co-relation 1869. Up to 99 conditions per place. [2021-10-15 19:34:49,379 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 28 changer transitions 0/94 dead transitions. [2021-10-15 19:34:49,379 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 94 transitions, 952 flow [2021-10-15 19:34:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:34:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:34:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 545 transitions. [2021-10-15 19:34:49,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.69693094629156 [2021-10-15 19:34:49,382 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 545 transitions. [2021-10-15 19:34:49,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 545 transitions. [2021-10-15 19:34:49,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:49,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 545 transitions. [2021-10-15 19:34:49,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 32.05882352941177) internal successors, (545), 17 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:49,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:49,388 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 46.0) internal successors, (828), 18 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:49,388 INFO L186 Difference]: Start difference. First operand has 122 places, 90 transitions, 828 flow. Second operand 17 states and 545 transitions. [2021-10-15 19:34:49,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 94 transitions, 952 flow [2021-10-15 19:34:49,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 94 transitions, 888 flow, removed 8 selfloop flow, removed 14 redundant places. [2021-10-15 19:34:49,414 INFO L242 Difference]: Finished difference. Result has 126 places, 94 transitions, 892 flow [2021-10-15 19:34:49,414 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=892, PETRI_PLACES=126, PETRI_TRANSITIONS=94} [2021-10-15 19:34:49,415 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 98 predicate places. [2021-10-15 19:34:49,415 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 94 transitions, 892 flow [2021-10-15 19:34:49,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.083333333333332) internal successors, (373), 12 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:49,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:49,416 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:49,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:49,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:49,622 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:49,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:49,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1197425055, now seen corresponding path program 2 times [2021-10-15 19:34:49,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:49,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101516965] [2021-10-15 19:34:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:49,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:49,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:49,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756877550] [2021-10-15 19:34:49,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:34:49,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:49,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:49,635 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:49,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 19:34:50,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:34:50,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:34:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:50,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:50,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101516965] [2021-10-15 19:34:50,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:50,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756877550] [2021-10-15 19:34:50,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756877550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:50,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:50,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:34:50,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000778601] [2021-10-15 19:34:50,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:34:50,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:50,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:34:50,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:34:50,315 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:50,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 94 transitions, 892 flow. Second operand has 12 states, 12 states have (on average 31.25) internal successors, (375), 12 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:50,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:50,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:50,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:50,560 INFO L129 PetriNetUnfolder]: 51/477 cut-off events. [2021-10-15 19:34:50,560 INFO L130 PetriNetUnfolder]: For 4529/4529 co-relation queries the response was YES. [2021-10-15 19:34:50,564 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 477 events. 51/477 cut-off events. For 4529/4529 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2413 event pairs, 0 based on Foata normal form. 4/481 useless extension candidates. Maximal degree in co-relation 1994. Up to 91 conditions per place. [2021-10-15 19:34:50,568 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 29 changer transitions 0/95 dead transitions. [2021-10-15 19:34:50,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 95 transitions, 978 flow [2021-10-15 19:34:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:34:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 19:34:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 576 transitions. [2021-10-15 19:34:50,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:50,579 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 576 transitions. [2021-10-15 19:34:50,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 576 transitions. [2021-10-15 19:34:50,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:50,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 576 transitions. [2021-10-15 19:34:50,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 32.0) internal successors, (576), 18 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:50,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:50,592 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 46.0) internal successors, (874), 19 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:50,593 INFO L186 Difference]: Start difference. First operand has 126 places, 94 transitions, 892 flow. Second operand 18 states and 576 transitions. [2021-10-15 19:34:50,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 95 transitions, 978 flow [2021-10-15 19:34:50,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 95 transitions, 884 flow, removed 23 selfloop flow, removed 14 redundant places. [2021-10-15 19:34:50,624 INFO L242 Difference]: Finished difference. Result has 130 places, 95 transitions, 876 flow [2021-10-15 19:34:50,624 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=876, PETRI_PLACES=130, PETRI_TRANSITIONS=95} [2021-10-15 19:34:50,624 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 102 predicate places. [2021-10-15 19:34:50,625 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 95 transitions, 876 flow [2021-10-15 19:34:50,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.25) internal successors, (375), 12 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:50,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:50,625 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:50,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:50,847 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1381361402, now seen corresponding path program 4 times [2021-10-15 19:34:50,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:50,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972886724] [2021-10-15 19:34:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:50,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:50,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:50,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334787108] [2021-10-15 19:34:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:34:50,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:50,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:50,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:50,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:34:51,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:34:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:34:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:51,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:51,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972886724] [2021-10-15 19:34:51,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:51,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334787108] [2021-10-15 19:34:51,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334787108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:51,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:51,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:34:51,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477554919] [2021-10-15 19:34:51,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:34:51,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:51,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:34:51,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:34:51,601 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:51,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 95 transitions, 876 flow. Second operand has 12 states, 12 states have (on average 31.5) internal successors, (378), 12 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 19:34:51,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:51,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:51,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:51,891 INFO L129 PetriNetUnfolder]: 51/481 cut-off events. [2021-10-15 19:34:51,891 INFO L130 PetriNetUnfolder]: For 4566/4566 co-relation queries the response was YES. [2021-10-15 19:34:51,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 481 events. 51/481 cut-off events. For 4566/4566 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2431 event pairs, 0 based on Foata normal form. 4/485 useless extension candidates. Maximal degree in co-relation 1999. Up to 83 conditions per place. [2021-10-15 19:34:51,898 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2021-10-15 19:34:51,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 97 transitions, 988 flow [2021-10-15 19:34:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 19:34:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 19:34:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 607 transitions. [2021-10-15 19:34:51,901 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6945080091533181 [2021-10-15 19:34:51,901 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 607 transitions. [2021-10-15 19:34:51,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 607 transitions. [2021-10-15 19:34:51,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:51,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 607 transitions. [2021-10-15 19:34:51,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 31.94736842105263) internal successors, (607), 19 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:51,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:51,905 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:51,906 INFO L186 Difference]: Start difference. First operand has 130 places, 95 transitions, 876 flow. Second operand 19 states and 607 transitions. [2021-10-15 19:34:51,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 97 transitions, 988 flow [2021-10-15 19:34:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 97 transitions, 926 flow, removed 6 selfloop flow, removed 15 redundant places. [2021-10-15 19:34:51,927 INFO L242 Difference]: Finished difference. Result has 134 places, 97 transitions, 921 flow [2021-10-15 19:34:51,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=921, PETRI_PLACES=134, PETRI_TRANSITIONS=97} [2021-10-15 19:34:51,927 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2021-10-15 19:34:51,928 INFO L470 AbstractCegarLoop]: Abstraction has has 134 places, 97 transitions, 921 flow [2021-10-15 19:34:51,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.5) internal successors, (378), 12 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 19:34:51,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:51,928 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:51,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:52,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 19:34:52,135 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1458365772, now seen corresponding path program 4 times [2021-10-15 19:34:52,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:52,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575010048] [2021-10-15 19:34:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:52,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:52,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:52,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97781395] [2021-10-15 19:34:52,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:34:52,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:52,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:52,147 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:52,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 19:34:52,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:34:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:34:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:52,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:52,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575010048] [2021-10-15 19:34:52,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:52,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97781395] [2021-10-15 19:34:52,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97781395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:52,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:52,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:34:52,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294024268] [2021-10-15 19:34:52,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:34:52,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:52,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:34:52,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:34:52,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:52,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 97 transitions, 921 flow. Second operand has 13 states, 13 states have (on average 31.076923076923077) internal successors, (404), 13 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:52,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:52,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:52,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:53,099 INFO L129 PetriNetUnfolder]: 54/516 cut-off events. [2021-10-15 19:34:53,100 INFO L130 PetriNetUnfolder]: For 5163/5163 co-relation queries the response was YES. [2021-10-15 19:34:53,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 516 events. 54/516 cut-off events. For 5163/5163 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2737 event pairs, 0 based on Foata normal form. 2/518 useless extension candidates. Maximal degree in co-relation 2187. Up to 99 conditions per place. [2021-10-15 19:34:53,108 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 32 changer transitions 0/101 dead transitions. [2021-10-15 19:34:53,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 101 transitions, 1061 flow [2021-10-15 19:34:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-15 19:34:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-15 19:34:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 609 transitions. [2021-10-15 19:34:53,111 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6967963386727689 [2021-10-15 19:34:53,111 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 609 transitions. [2021-10-15 19:34:53,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 609 transitions. [2021-10-15 19:34:53,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:53,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 609 transitions. [2021-10-15 19:34:53,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 32.05263157894737) internal successors, (609), 19 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:53,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:53,124 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 46.0) internal successors, (920), 20 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:53,124 INFO L186 Difference]: Start difference. First operand has 134 places, 97 transitions, 921 flow. Second operand 19 states and 609 transitions. [2021-10-15 19:34:53,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 101 transitions, 1061 flow [2021-10-15 19:34:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 101 transitions, 983 flow, removed 10 selfloop flow, removed 16 redundant places. [2021-10-15 19:34:53,155 INFO L242 Difference]: Finished difference. Result has 138 places, 101 transitions, 987 flow [2021-10-15 19:34:53,155 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=987, PETRI_PLACES=138, PETRI_TRANSITIONS=101} [2021-10-15 19:34:53,158 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 110 predicate places. [2021-10-15 19:34:53,158 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 101 transitions, 987 flow [2021-10-15 19:34:53,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.076923076923077) internal successors, (404), 13 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:53,159 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:53,159 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:53,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:53,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:53,375 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:53,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:53,376 INFO L82 PathProgramCache]: Analyzing trace with hash -627548749, now seen corresponding path program 3 times [2021-10-15 19:34:53,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:53,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798668130] [2021-10-15 19:34:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:53,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:53,385 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:53,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054628372] [2021-10-15 19:34:53,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:34:53,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:53,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:53,387 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:53,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 19:34:54,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 19:34:54,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:34:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:54,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:54,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798668130] [2021-10-15 19:34:54,407 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:54,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054628372] [2021-10-15 19:34:54,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054628372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:54,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:54,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:34:54,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951903974] [2021-10-15 19:34:54,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:34:54,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:54,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:34:54,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:34:54,409 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:54,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 101 transitions, 987 flow. Second operand has 13 states, 13 states have (on average 31.23076923076923) internal successors, (406), 13 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:54,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:54,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:54,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:54,665 INFO L129 PetriNetUnfolder]: 54/520 cut-off events. [2021-10-15 19:34:54,665 INFO L130 PetriNetUnfolder]: For 5918/5918 co-relation queries the response was YES. [2021-10-15 19:34:54,670 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 520 events. 54/520 cut-off events. For 5918/5918 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2652 event pairs, 0 based on Foata normal form. 4/524 useless extension candidates. Maximal degree in co-relation 2314. Up to 91 conditions per place. [2021-10-15 19:34:54,674 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 33 changer transitions 0/102 dead transitions. [2021-10-15 19:34:54,675 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 102 transitions, 1083 flow [2021-10-15 19:34:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:34:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 19:34:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 640 transitions. [2021-10-15 19:34:54,677 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2021-10-15 19:34:54,678 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 640 transitions. [2021-10-15 19:34:54,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 640 transitions. [2021-10-15 19:34:54,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 640 transitions. [2021-10-15 19:34:54,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 32.0) internal successors, (640), 20 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:54,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:54,683 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 46.0) internal successors, (966), 21 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:54,683 INFO L186 Difference]: Start difference. First operand has 138 places, 101 transitions, 987 flow. Second operand 20 states and 640 transitions. [2021-10-15 19:34:54,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 102 transitions, 1083 flow [2021-10-15 19:34:54,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 102 transitions, 973 flow, removed 27 selfloop flow, removed 16 redundant places. [2021-10-15 19:34:54,719 INFO L242 Difference]: Finished difference. Result has 142 places, 102 transitions, 965 flow [2021-10-15 19:34:54,720 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=965, PETRI_PLACES=142, PETRI_TRANSITIONS=102} [2021-10-15 19:34:54,721 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 114 predicate places. [2021-10-15 19:34:54,721 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 102 transitions, 965 flow [2021-10-15 19:34:54,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.23076923076923) internal successors, (406), 13 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:54,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:54,722 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:54,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:54,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:54,930 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash 671648782, now seen corresponding path program 5 times [2021-10-15 19:34:54,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:54,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791118051] [2021-10-15 19:34:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:54,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:54,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:54,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297021974] [2021-10-15 19:34:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:34:54,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:54,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:54,939 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:54,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 19:34:55,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-15 19:34:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:34:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:34:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:34:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:34:55,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:34:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791118051] [2021-10-15 19:34:55,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:34:55,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297021974] [2021-10-15 19:34:55,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297021974] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:34:55,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:34:55,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:34:55,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258888863] [2021-10-15 19:34:55,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:34:55,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:34:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:34:55,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:34:55,602 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 46 [2021-10-15 19:34:55,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 102 transitions, 965 flow. Second operand has 13 states, 13 states have (on average 31.53846153846154) internal successors, (410), 13 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:55,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:34:55,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 46 [2021-10-15 19:34:55,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:34:55,887 INFO L129 PetriNetUnfolder]: 54/524 cut-off events. [2021-10-15 19:34:55,887 INFO L130 PetriNetUnfolder]: For 5930/5930 co-relation queries the response was YES. [2021-10-15 19:34:55,892 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 524 events. 54/524 cut-off events. For 5930/5930 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2663 event pairs, 0 based on Foata normal form. 4/528 useless extension candidates. Maximal degree in co-relation 2313. Up to 83 conditions per place. [2021-10-15 19:34:55,896 INFO L132 encePairwiseOnDemand]: 40/46 looper letters, 7 selfloop transitions, 39 changer transitions 0/104 dead transitions. [2021-10-15 19:34:55,897 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 104 transitions, 1091 flow [2021-10-15 19:34:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 19:34:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 19:34:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 671 transitions. [2021-10-15 19:34:55,900 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6946169772256728 [2021-10-15 19:34:55,900 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 671 transitions. [2021-10-15 19:34:55,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 671 transitions. [2021-10-15 19:34:55,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:34:55,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 671 transitions. [2021-10-15 19:34:55,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 31.952380952380953) internal successors, (671), 21 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:55,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:55,905 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 46.0) internal successors, (1012), 22 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:55,905 INFO L186 Difference]: Start difference. First operand has 142 places, 102 transitions, 965 flow. Second operand 21 states and 671 transitions. [2021-10-15 19:34:55,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 104 transitions, 1091 flow [2021-10-15 19:34:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 104 transitions, 1019 flow, removed 7 selfloop flow, removed 17 redundant places. [2021-10-15 19:34:55,941 INFO L242 Difference]: Finished difference. Result has 146 places, 104 transitions, 1014 flow [2021-10-15 19:34:55,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1014, PETRI_PLACES=146, PETRI_TRANSITIONS=104} [2021-10-15 19:34:55,942 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 118 predicate places. [2021-10-15 19:34:55,942 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 104 transitions, 1014 flow [2021-10-15 19:34:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.53846153846154) internal successors, (410), 13 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:34:55,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:34:55,943 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:34:55,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:56,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-15 19:34:56,162 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-10-15 19:34:56,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:34:56,163 INFO L82 PathProgramCache]: Analyzing trace with hash -258254836, now seen corresponding path program 5 times [2021-10-15 19:34:56,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:34:56,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175265174] [2021-10-15 19:34:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:34:56,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:34:56,180 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:34:56,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741797793] [2021-10-15 19:34:56,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:34:56,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:56,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:34:56,185 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:34:56,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-15 19:34:56,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-15 19:34:56,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-15 19:34:56,631 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:34:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:34:56,704 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:34:56,705 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:34:56,706 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:34:56,708 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:34:56,709 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:34:56,709 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:34:56,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-15 19:34:56,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:34:56,943 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:34:57,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:34:57 BoogieIcfgContainer [2021-10-15 19:34:57,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:34:57,033 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:34:57,033 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:34:57,033 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:34:57,034 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:34:17" (3/4) ... [2021-10-15 19:34:57,036 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:34:57,144 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:34:57,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:34:57,146 INFO L168 Benchmark]: Toolchain (without parser) took 40461.93 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 86.2 MB in the beginning and 107.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 68.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,147 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 81.8 MB. Free memory was 53.6 MB in the beginning and 53.6 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:34:57,148 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.80 ms. Allocated memory is still 119.5 MB. Free memory was 86.2 MB in the beginning and 95.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,148 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.61 ms. Allocated memory is still 119.5 MB. Free memory was 95.4 MB in the beginning and 94.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:34:57,149 INFO L168 Benchmark]: Boogie Preprocessor took 36.78 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,149 INFO L168 Benchmark]: RCFGBuilder took 537.21 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 81.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,150 INFO L168 Benchmark]: TraceAbstraction took 39331.11 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 80.7 MB in the beginning and 45.2 MB in the end (delta: 35.6 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,150 INFO L168 Benchmark]: Witness Printer took 111.72 ms. Allocated memory is still 144.7 MB. Free memory was 45.2 MB in the beginning and 107.8 MB in the end (delta: -62.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:34:57,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 81.8 MB. Free memory was 53.6 MB in the beginning and 53.6 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 389.80 ms. Allocated memory is still 119.5 MB. Free memory was 86.2 MB in the beginning and 95.9 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.61 ms. Allocated memory is still 119.5 MB. Free memory was 95.4 MB in the beginning and 94.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.78 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 92.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.21 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 81.5 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39331.11 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 80.7 MB in the beginning and 45.2 MB in the end (delta: 35.6 MB). Peak memory consumption was 61.2 MB. Max. memory is 16.1 GB. * Witness Printer took 111.72 ms. Allocated memory is still 144.7 MB. Free memory was 45.2 MB in the beginning and 107.8 MB in the end (delta: -62.6 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L9] COND FALSE !(!cond) VAL [counter=0] [L29] u = ((long long) 2 * R) + 1 [L30] v = 1 [L31] r = ((long long) R * R) - A VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(r != 0)) VAL [counter=1] [L39] EXPR counter++ VAL [counter=2] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L41] COND TRUE !(r > 0) VAL [counter=2] [L47] EXPR counter++ VAL [counter=3] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=3] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=3] [L47] EXPR counter++ VAL [counter=4] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=4] [L49] COND TRUE !(r < 0) VAL [counter=4] [L34] EXPR counter++ VAL [counter=5] [L34] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=5] [L36] COND FALSE !(!(r != 0)) VAL [counter=5] [L39] EXPR counter++ VAL [counter=6] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=6] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=6] [L39] EXPR counter++ VAL [counter=7] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=7] [L41] COND FALSE !(!(r > 0)) [L43] r = r - v [L44] v = v + 2 VAL [counter=7] [L39] EXPR counter++ VAL [counter=8] [L39] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=8] [L41] COND TRUE !(r > 0) VAL [counter=8] [L47] EXPR counter++ VAL [counter=9] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=9] [L49] COND FALSE !(!(r < 0)) [L51] r = r + u [L52] u = u + 2 VAL [counter=9] [L47] EXPR counter++ VAL [counter=10] [L47] COND TRUE counter++<10 [L12] COND FALSE !(!(cond)) VAL [counter=10] [L49] COND TRUE !(r < 0) VAL [counter=10] [L34] EXPR counter++ VAL [counter=11] [L34] COND FALSE !(counter++<10) [L12] COND TRUE !(cond) VAL [counter=11] [L14] reach_error() VAL [counter=11] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 6.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 39087.1ms, OverallIterations: 32, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 14857.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 100.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 121 SDtfs, 145 SDslu, 125 SDs, 0 SdLazy, 1010 SolverSat, 517 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 10318.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1084 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2263.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1014occurred in iteration=31, InterpolantAutomatonStates: 342, 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: 295.5ms SsaConstructionTime, 2808.6ms SatisfiabilityAnalysisTime, 6567.4ms InterpolantComputationTime, 1071 NumberOfCodeBlocks, 1059 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 989 ConstructedInterpolants, 0 QuantifiedInterpolants, 2986 SizeOfPredicates, 151 NumberOfNonLiveVariables, 4222 ConjunctsInSsa, 374 ConjunctsInUnsatCore, 31 InterpolantComputations, 9 PerfectInterpolantSequences, 156/710 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:34:57,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a245c61c-8f2a-46de-acfa-1c51fb39c7f8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...