./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/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 0f3c6dbfc61bcfa3bb6247579821c45f98d2bd1b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:38:39,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:38:39,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:38:39,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:38:39,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:38:39,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:38:39,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:38:39,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:38:39,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:38:39,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:38:39,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:38:39,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:38:39,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:38:39,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:38:39,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:38:39,246 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:38:39,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:38:39,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:38:39,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:38:39,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:38:39,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:38:39,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:38:39,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:38:39,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:38:39,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:38:39,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:38:39,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:38:39,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:38:39,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:38:39,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:38:39,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:38:39,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:38:39,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:38:39,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:38:39,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:38:39,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:38:39,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:38:39,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:38:39,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:38:39,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:38:39,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:38:39,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:38:39,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:38:39,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:38:39,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:38:39,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:38:39,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:38:39,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:38:39,352 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:38:39,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:38:39,353 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:38:39,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:38:39,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:38:39,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:38:39,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:38:39,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:38:39,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:38:39,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:38:39,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:38:39,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:38:39,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:38:39,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:38:39,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:38:39,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:38:39,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:38:39,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:38:39,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:38:39,359 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:38:39,359 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:38:39,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:38:39,359 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:38:39,361 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:38:39,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:38:39,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:38:39,362 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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f3c6dbfc61bcfa3bb6247579821c45f98d2bd1b [2021-10-15 19:38:39,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:38:39,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:38:39,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:38:39,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:38:39,712 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:38:39,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-10-15 19:38:39,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/data/125ad18c7/0f14cc9ba0a24b20a86c8ae24989f671/FLAG67ef04845 [2021-10-15 19:38:40,327 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:38:40,327 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-10-15 19:38:40,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/data/125ad18c7/0f14cc9ba0a24b20a86c8ae24989f671/FLAG67ef04845 [2021-10-15 19:38:40,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/data/125ad18c7/0f14cc9ba0a24b20a86c8ae24989f671 [2021-10-15 19:38:40,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:38:40,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:38:40,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:38:40,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:38:40,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:38:40,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:40,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bea90f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40, skipping insertion in model container [2021-10-15 19:38:40,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:40,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:38:40,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:38:40,912 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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2021-10-15 19:38:40,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:38:40,946 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:38:40,961 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_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound50.c[576,589] [2021-10-15 19:38:40,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:38:40,986 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:38:40,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40 WrapperNode [2021-10-15 19:38:40,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:38:40,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:38:40,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:38:40,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:38:40,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:38:41,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:38:41,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:38:41,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:38:41,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:38:41,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:38:41,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:38:41,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:38:41,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (1/1) ... [2021-10-15 19:38:41,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:38:41,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:41,125 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:38:41,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:38:41,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:38:41,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:38:41,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:38:41,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:38:41,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:38:41,545 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-15 19:38:41,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:41 BoogieIcfgContainer [2021-10-15 19:38:41,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:38:41,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:38:41,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:38:41,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:38:41,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:38:40" (1/3) ... [2021-10-15 19:38:41,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705d1aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:41, skipping insertion in model container [2021-10-15 19:38:41,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:38:40" (2/3) ... [2021-10-15 19:38:41,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@705d1aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:38:41, skipping insertion in model container [2021-10-15 19:38:41,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:41" (3/3) ... [2021-10-15 19:38:41,580 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.c [2021-10-15 19:38:41,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:38:41,587 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:38:41,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:38:41,673 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 19:38:41,675 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:38:41,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 54 transitions, 108 flow [2021-10-15 19:38:41,739 INFO L129 PetriNetUnfolder]: 14/54 cut-off events. [2021-10-15 19:38:41,743 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:41,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 54 events. 14/54 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:38:41,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 54 transitions, 108 flow [2021-10-15 19:38:41,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 49 transitions, 98 flow [2021-10-15 19:38:41,764 INFO L129 PetriNetUnfolder]: 3/14 cut-off events. [2021-10-15 19:38:41,764 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:41,764 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:41,768 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:41,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:41,776 INFO L82 PathProgramCache]: Analyzing trace with hash 122367883, now seen corresponding path program 1 times [2021-10-15 19:38:41,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:41,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109591496] [2021-10-15 19:38:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:41,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:41,954 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 19:38:41,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:41,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109591496] [2021-10-15 19:38:41,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109591496] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:41,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:41,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:38:41,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955811519] [2021-10-15 19:38:41,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:38:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:38:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:38:41,984 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 54 [2021-10-15 19:38:41,988 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 49 transitions, 98 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:41,988 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:41,988 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 54 [2021-10-15 19:38:41,990 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:42,001 INFO L129 PetriNetUnfolder]: 4/40 cut-off events. [2021-10-15 19:38:42,002 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:42,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 40 events. 4/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 9/39 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2021-10-15 19:38:42,005 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 0 selfloop transitions, 0 changer transitions 0/40 dead transitions. [2021-10-15 19:38:42,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 80 flow [2021-10-15 19:38:42,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:38:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:38:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 97 transitions. [2021-10-15 19:38:42,018 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8981481481481481 [2021-10-15 19:38:42,019 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 97 transitions. [2021-10-15 19:38:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 97 transitions. [2021-10-15 19:38:42,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:42,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 97 transitions. [2021-10-15 19:38:42,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 48.5) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,031 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,033 INFO L186 Difference]: Start difference. First operand has 37 places, 49 transitions, 98 flow. Second operand 2 states and 97 transitions. [2021-10-15 19:38:42,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 80 flow [2021-10-15 19:38:42,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:38:42,039 INFO L242 Difference]: Finished difference. Result has 38 places, 40 transitions, 80 flow [2021-10-15 19:38:42,041 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=40} [2021-10-15 19:38:42,042 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2021-10-15 19:38:42,043 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 40 transitions, 80 flow [2021-10-15 19:38:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,043 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:42,044 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:42,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:38:42,045 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-15 19:38:42,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:42,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271487955] [2021-10-15 19:38:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:42,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:42,068 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:42,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786019680] [2021-10-15 19:38:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:42,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:42,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:42,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:42,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:38:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:38:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:42,450 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 19:38:42,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:42,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271487955] [2021-10-15 19:38:42,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:42,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786019680] [2021-10-15 19:38:42,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786019680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:42,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:42,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:38:42,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467697920] [2021-10-15 19:38:42,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:42,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:42,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:42,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:42,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2021-10-15 19:38:42,458 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 40 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,458 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:42,458 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2021-10-15 19:38:42,458 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:42,711 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2021-10-15 19:38:42,716 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:38:42,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 90. Up to 27 conditions per place. [2021-10-15 19:38:42,721 INFO L132 encePairwiseOnDemand]: 47/54 looper letters, 31 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2021-10-15 19:38:42,721 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 172 flow [2021-10-15 19:38:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:38:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:38:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2021-10-15 19:38:42,729 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2021-10-15 19:38:42,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 128 transitions. [2021-10-15 19:38:42,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 128 transitions. [2021-10-15 19:38:42,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:42,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 128 transitions. [2021-10-15 19:38:42,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:38:42,746 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:38:42,746 INFO L186 Difference]: Start difference. First operand has 38 places, 40 transitions, 80 flow. Second operand 6 states and 128 transitions. [2021-10-15 19:38:42,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 172 flow [2021-10-15 19:38:42,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:38:42,751 INFO L242 Difference]: Finished difference. Result has 45 places, 43 transitions, 112 flow [2021-10-15 19:38:42,753 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2021-10-15 19:38:42,754 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2021-10-15 19:38:42,754 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 112 flow [2021-10-15 19:38:42,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:42,755 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:42,755 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:42,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:42,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:42,969 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1182906761, now seen corresponding path program 1 times [2021-10-15 19:38:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:42,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074320230] [2021-10-15 19:38:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:42,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:42,996 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:43,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409947530] [2021-10-15 19:38:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:43,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:43,002 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:43,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:38:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:38:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:43,107 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 19:38:43,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:43,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074320230] [2021-10-15 19:38:43,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:43,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409947530] [2021-10-15 19:38:43,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409947530] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:43,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:43,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:38:43,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920047954] [2021-10-15 19:38:43,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:38:43,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:43,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:38:43,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:38:43,112 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:43,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:43,113 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:43,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:43,135 INFO L129 PetriNetUnfolder]: 4/52 cut-off events. [2021-10-15 19:38:43,135 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-15 19:38:43,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 52 events. 4/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 1/45 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2021-10-15 19:38:43,136 INFO L132 encePairwiseOnDemand]: 50/54 looper letters, 5 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2021-10-15 19:38:43,136 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 130 flow [2021-10-15 19:38:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:38:43,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:38:43,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 161 transitions. [2021-10-15 19:38:43,138 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7453703703703703 [2021-10-15 19:38:43,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 161 transitions. [2021-10-15 19:38:43,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 161 transitions. [2021-10-15 19:38:43,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:43,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 161 transitions. [2021-10-15 19:38:43,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.25) internal successors, (161), 4 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 19:38:43,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,143 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,143 INFO L186 Difference]: Start difference. First operand has 45 places, 43 transitions, 112 flow. Second operand 4 states and 161 transitions. [2021-10-15 19:38:43,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 130 flow [2021-10-15 19:38:43,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 124 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:38:43,147 INFO L242 Difference]: Finished difference. Result has 47 places, 44 transitions, 122 flow [2021-10-15 19:38:43,147 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2021-10-15 19:38:43,147 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2021-10-15 19:38:43,147 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 122 flow [2021-10-15 19:38:43,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,148 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:43,148 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:43,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:43,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:43,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:43,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-10-15 19:38:43,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:43,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085465151] [2021-10-15 19:38:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:43,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:43,401 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:43,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859454473] [2021-10-15 19:38:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:43,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:43,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:43,403 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:43,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:38:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:43,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-15 19:38:43,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:43,647 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 19:38:43,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:43,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085465151] [2021-10-15 19:38:43,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:43,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859454473] [2021-10-15 19:38:43,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859454473] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:43,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:43,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:38:43,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623975933] [2021-10-15 19:38:43,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:43,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:43,653 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:43,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 19:38:43,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:43,654 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:43,654 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:43,890 INFO L129 PetriNetUnfolder]: 8/75 cut-off events. [2021-10-15 19:38:43,890 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-10-15 19:38:43,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 75 events. 8/75 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 1/66 useless extension candidates. Maximal degree in co-relation 146. Up to 28 conditions per place. [2021-10-15 19:38:43,892 INFO L132 encePairwiseOnDemand]: 41/54 looper letters, 38 selfloop transitions, 11 changer transitions 2/65 dead transitions. [2021-10-15 19:38:43,892 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 268 flow [2021-10-15 19:38:43,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:38:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:38:43,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2021-10-15 19:38:43,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2021-10-15 19:38:43,895 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 166 transitions. [2021-10-15 19:38:43,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 166 transitions. [2021-10-15 19:38:43,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:43,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 166 transitions. [2021-10-15 19:38:43,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,900 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:43,900 INFO L186 Difference]: Start difference. First operand has 47 places, 44 transitions, 122 flow. Second operand 7 states and 166 transitions. [2021-10-15 19:38:43,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 268 flow [2021-10-15 19:38:43,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:38:43,917 INFO L242 Difference]: Finished difference. Result has 55 places, 51 transitions, 190 flow [2021-10-15 19:38:43,918 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2021-10-15 19:38:43,918 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2021-10-15 19:38:43,918 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 190 flow [2021-10-15 19:38:43,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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 19:38:43,919 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:43,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:43,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:44,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:44,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1896102171, now seen corresponding path program 1 times [2021-10-15 19:38:44,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:44,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741571715] [2021-10-15 19:38:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:44,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:44,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:44,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139807755] [2021-10-15 19:38:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:44,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:44,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:44,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:38:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:44,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:38:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:44,355 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 19:38:44,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:44,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741571715] [2021-10-15 19:38:44,356 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:44,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139807755] [2021-10-15 19:38:44,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139807755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:44,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:44,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:38:44,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276241017] [2021-10-15 19:38:44,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:38:44,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:38:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:38:44,368 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:44,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:44,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:44,369 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:44,521 INFO L129 PetriNetUnfolder]: 15/129 cut-off events. [2021-10-15 19:38:44,521 INFO L130 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2021-10-15 19:38:44,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 129 events. 15/129 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 317 event pairs, 0 based on Foata normal form. 1/118 useless extension candidates. Maximal degree in co-relation 299. Up to 51 conditions per place. [2021-10-15 19:38:44,526 INFO L132 encePairwiseOnDemand]: 43/54 looper letters, 53 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2021-10-15 19:38:44,526 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 432 flow [2021-10-15 19:38:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:38:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:38:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2021-10-15 19:38:44,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5037037037037037 [2021-10-15 19:38:44,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 136 transitions. [2021-10-15 19:38:44,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 136 transitions. [2021-10-15 19:38:44,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:44,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 136 transitions. [2021-10-15 19:38:44,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,537 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,537 INFO L186 Difference]: Start difference. First operand has 55 places, 51 transitions, 190 flow. Second operand 5 states and 136 transitions. [2021-10-15 19:38:44,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 432 flow [2021-10-15 19:38:44,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 427 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:44,550 INFO L242 Difference]: Finished difference. Result has 61 places, 62 transitions, 311 flow [2021-10-15 19:38:44,550 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2021-10-15 19:38:44,550 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2021-10-15 19:38:44,550 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 311 flow [2021-10-15 19:38:44,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:44,551 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:44,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:44,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:44,775 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2092681793, now seen corresponding path program 1 times [2021-10-15 19:38:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:44,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980817596] [2021-10-15 19:38:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:44,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:44,791 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:44,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045109121] [2021-10-15 19:38:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:44,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:44,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:44,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:38:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:44,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:38:44,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:44,987 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 19:38:44,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:44,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980817596] [2021-10-15 19:38:44,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:44,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045109121] [2021-10-15 19:38:44,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045109121] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:44,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:44,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:38:44,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598481520] [2021-10-15 19:38:44,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:44,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:44,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:44,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:44,991 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:44,991 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:44,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:44,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:44,992 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:45,168 INFO L129 PetriNetUnfolder]: 17/132 cut-off events. [2021-10-15 19:38:45,168 INFO L130 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2021-10-15 19:38:45,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 132 events. 17/132 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 311 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 372. Up to 39 conditions per place. [2021-10-15 19:38:45,170 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 34 selfloop transitions, 17 changer transitions 0/65 dead transitions. [2021-10-15 19:38:45,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 442 flow [2021-10-15 19:38:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:38:45,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:38:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2021-10-15 19:38:45,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2021-10-15 19:38:45,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 142 transitions. [2021-10-15 19:38:45,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 142 transitions. [2021-10-15 19:38:45,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:45,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 142 transitions. [2021-10-15 19:38:45,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,176 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,176 INFO L186 Difference]: Start difference. First operand has 61 places, 62 transitions, 311 flow. Second operand 7 states and 142 transitions. [2021-10-15 19:38:45,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 442 flow [2021-10-15 19:38:45,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 432 flow, removed 5 selfloop flow, removed 0 redundant places. [2021-10-15 19:38:45,184 INFO L242 Difference]: Finished difference. Result has 66 places, 65 transitions, 375 flow [2021-10-15 19:38:45,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=375, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2021-10-15 19:38:45,185 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 29 predicate places. [2021-10-15 19:38:45,185 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 375 flow [2021-10-15 19:38:45,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:45,186 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:45,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:45,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:45,411 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:45,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1527669658, now seen corresponding path program 1 times [2021-10-15 19:38:45,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:45,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585872511] [2021-10-15 19:38:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:45,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:45,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:45,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306569776] [2021-10-15 19:38:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:45,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:45,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:45,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:45,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:38:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:45,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:38:45,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:45,585 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 19:38:45,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:45,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585872511] [2021-10-15 19:38:45,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:45,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306569776] [2021-10-15 19:38:45,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306569776] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:45,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:45,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:38:45,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983835755] [2021-10-15 19:38:45,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:38:45,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:38:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:38:45,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:45,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 375 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:45,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:45,600 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:45,641 INFO L129 PetriNetUnfolder]: 15/126 cut-off events. [2021-10-15 19:38:45,641 INFO L130 PetriNetUnfolder]: For 144/144 co-relation queries the response was YES. [2021-10-15 19:38:45,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 126 events. 15/126 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 282 event pairs, 0 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 319. Up to 22 conditions per place. [2021-10-15 19:38:45,643 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 7 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2021-10-15 19:38:45,643 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 377 flow [2021-10-15 19:38:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:38:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:38:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2021-10-15 19:38:45,645 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7407407407407407 [2021-10-15 19:38:45,645 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 200 transitions. [2021-10-15 19:38:45,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 200 transitions. [2021-10-15 19:38:45,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:45,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 200 transitions. [2021-10-15 19:38:45,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,649 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,649 INFO L186 Difference]: Start difference. First operand has 66 places, 65 transitions, 375 flow. Second operand 5 states and 200 transitions. [2021-10-15 19:38:45,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 377 flow [2021-10-15 19:38:45,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 63 transitions, 347 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-10-15 19:38:45,663 INFO L242 Difference]: Finished difference. Result has 67 places, 63 transitions, 341 flow [2021-10-15 19:38:45,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2021-10-15 19:38:45,664 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2021-10-15 19:38:45,664 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 341 flow [2021-10-15 19:38:45,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:45,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:45,664 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, 1] [2021-10-15 19:38:45,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:45,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:45,883 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:45,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1135496359, now seen corresponding path program 1 times [2021-10-15 19:38:45,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:45,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622979957] [2021-10-15 19:38:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:45,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:45,904 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:45,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346323593] [2021-10-15 19:38:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:45,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:45,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:45,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:45,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:38:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:45,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:38:45,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:46,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:46,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:46,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622979957] [2021-10-15 19:38:46,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:46,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346323593] [2021-10-15 19:38:46,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346323593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:46,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:46,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:38:46,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605164798] [2021-10-15 19:38:46,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:46,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:46,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:46,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:46,082 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:46,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 341 flow. Second operand has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,083 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:46,083 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:46,083 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:46,120 INFO L129 PetriNetUnfolder]: 15/128 cut-off events. [2021-10-15 19:38:46,121 INFO L130 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2021-10-15 19:38:46,124 INFO L84 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 128 events. 15/128 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 282 event pairs, 0 based on Foata normal form. 1/129 useless extension candidates. Maximal degree in co-relation 319. Up to 22 conditions per place. [2021-10-15 19:38:46,124 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 9 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2021-10-15 19:38:46,125 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 389 flow [2021-10-15 19:38:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:38:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:38:46,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 279 transitions. [2021-10-15 19:38:46,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2021-10-15 19:38:46,127 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 279 transitions. [2021-10-15 19:38:46,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 279 transitions. [2021-10-15 19:38:46,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:46,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 279 transitions. [2021-10-15 19:38:46,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,130 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,132 INFO L186 Difference]: Start difference. First operand has 67 places, 63 transitions, 341 flow. Second operand 7 states and 279 transitions. [2021-10-15 19:38:46,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 389 flow [2021-10-15 19:38:46,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 385 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:46,138 INFO L242 Difference]: Finished difference. Result has 73 places, 66 transitions, 380 flow [2021-10-15 19:38:46,138 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2021-10-15 19:38:46,139 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 36 predicate places. [2021-10-15 19:38:46,139 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 380 flow [2021-10-15 19:38:46,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.166666666666664) internal successors, (235), 6 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:46,139 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:46,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:46,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:38:46,363 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:46,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1501746768, now seen corresponding path program 1 times [2021-10-15 19:38:46,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:46,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331713753] [2021-10-15 19:38:46,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:46,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:46,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:46,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707226853] [2021-10-15 19:38:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:46,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:46,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:46,375 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:46,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:38:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:46,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:38:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:46,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:46,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331713753] [2021-10-15 19:38:46,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:46,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707226853] [2021-10-15 19:38:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707226853] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:46,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:46,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:38:46,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24110018] [2021-10-15 19:38:46,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:38:46,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:46,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:38:46,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:38:46,714 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2021-10-15 19:38:46,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 380 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 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 19:38:46,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:46,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2021-10-15 19:38:46,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:46,987 INFO L129 PetriNetUnfolder]: 21/176 cut-off events. [2021-10-15 19:38:46,987 INFO L130 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2021-10-15 19:38:46,988 INFO L84 FinitePrefix]: Finished finitePrefix Result has 573 conditions, 176 events. 21/176 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 434 event pairs, 0 based on Foata normal form. 5/181 useless extension candidates. Maximal degree in co-relation 554. Up to 52 conditions per place. [2021-10-15 19:38:46,989 INFO L132 encePairwiseOnDemand]: 41/54 looper letters, 75 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2021-10-15 19:38:46,990 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 115 transitions, 806 flow [2021-10-15 19:38:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:38:46,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:38:46,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2021-10-15 19:38:46,991 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2021-10-15 19:38:46,992 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 214 transitions. [2021-10-15 19:38:46,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 214 transitions. [2021-10-15 19:38:46,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:46,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 214 transitions. [2021-10-15 19:38:46,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 23.77777777777778) internal successors, (214), 9 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,995 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:46,995 INFO L186 Difference]: Start difference. First operand has 73 places, 66 transitions, 380 flow. Second operand 9 states and 214 transitions. [2021-10-15 19:38:46,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 115 transitions, 806 flow [2021-10-15 19:38:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 793 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-10-15 19:38:47,002 INFO L242 Difference]: Finished difference. Result has 80 places, 76 transitions, 525 flow [2021-10-15 19:38:47,002 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=525, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2021-10-15 19:38:47,002 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 43 predicate places. [2021-10-15 19:38:47,003 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 525 flow [2021-10-15 19:38:47,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 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 19:38:47,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:47,003 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 19:38:47,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:47,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:47,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash 839910097, now seen corresponding path program 1 times [2021-10-15 19:38:47,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:47,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840471169] [2021-10-15 19:38:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:47,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:47,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:47,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164665409] [2021-10-15 19:38:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:47,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:47,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:47,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:47,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:38:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:38:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:47,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:47,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840471169] [2021-10-15 19:38:47,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:47,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164665409] [2021-10-15 19:38:47,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164665409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:47,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:47,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:38:47,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114751541] [2021-10-15 19:38:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:47,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:47,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:47,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 525 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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 19:38:47,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:47,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:47,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:47,749 INFO L129 PetriNetUnfolder]: 30/240 cut-off events. [2021-10-15 19:38:47,749 INFO L130 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2021-10-15 19:38:47,750 INFO L84 FinitePrefix]: Finished finitePrefix Result has 852 conditions, 240 events. 30/240 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 713 event pairs, 0 based on Foata normal form. 5/245 useless extension candidates. Maximal degree in co-relation 830. Up to 96 conditions per place. [2021-10-15 19:38:47,752 INFO L132 encePairwiseOnDemand]: 40/54 looper letters, 91 selfloop transitions, 27 changer transitions 4/138 dead transitions. [2021-10-15 19:38:47,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 138 transitions, 1133 flow [2021-10-15 19:38:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:38:47,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:38:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2021-10-15 19:38:47,754 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2021-10-15 19:38:47,755 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 230 transitions. [2021-10-15 19:38:47,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 230 transitions. [2021-10-15 19:38:47,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:47,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 230 transitions. [2021-10-15 19:38:47,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 25.555555555555557) internal successors, (230), 9 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 19:38:47,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,758 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:47,758 INFO L186 Difference]: Start difference. First operand has 80 places, 76 transitions, 525 flow. Second operand 9 states and 230 transitions. [2021-10-15 19:38:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 138 transitions, 1133 flow [2021-10-15 19:38:47,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1046 flow, removed 24 selfloop flow, removed 4 redundant places. [2021-10-15 19:38:47,768 INFO L242 Difference]: Finished difference. Result has 90 places, 95 transitions, 736 flow [2021-10-15 19:38:47,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=736, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2021-10-15 19:38:47,768 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 53 predicate places. [2021-10-15 19:38:47,769 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 736 flow [2021-10-15 19:38:47,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 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 19:38:47,769 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:47,769 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:47,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:47,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:38:47,991 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:47,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:47,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1388511663, now seen corresponding path program 1 times [2021-10-15 19:38:47,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:47,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030075253] [2021-10-15 19:38:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:47,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:48,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:48,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595661462] [2021-10-15 19:38:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:48,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:48,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:48,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:38:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:48,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:38:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:48,229 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 19:38:48,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:48,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030075253] [2021-10-15 19:38:48,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:48,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595661462] [2021-10-15 19:38:48,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595661462] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:48,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:48,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:38:48,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569488007] [2021-10-15 19:38:48,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:48,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:48,233 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:48,234 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 736 flow. Second operand has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 6 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,234 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:48,234 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:48,234 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:48,311 INFO L129 PetriNetUnfolder]: 28/234 cut-off events. [2021-10-15 19:38:48,311 INFO L130 PetriNetUnfolder]: For 576/576 co-relation queries the response was YES. [2021-10-15 19:38:48,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 234 events. 28/234 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 664 event pairs, 0 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 731. Up to 41 conditions per place. [2021-10-15 19:38:48,314 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 9 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2021-10-15 19:38:48,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 736 flow [2021-10-15 19:38:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:38:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:38:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 279 transitions. [2021-10-15 19:38:48,316 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2021-10-15 19:38:48,316 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 279 transitions. [2021-10-15 19:38:48,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 279 transitions. [2021-10-15 19:38:48,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:48,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 279 transitions. [2021-10-15 19:38:48,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 39.857142857142854) internal successors, (279), 7 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,320 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 54.0) internal successors, (432), 8 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,320 INFO L186 Difference]: Start difference. First operand has 90 places, 95 transitions, 736 flow. Second operand 7 states and 279 transitions. [2021-10-15 19:38:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 736 flow [2021-10-15 19:38:48,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 706 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-10-15 19:38:48,330 INFO L242 Difference]: Finished difference. Result has 97 places, 92 transitions, 692 flow [2021-10-15 19:38:48,330 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=692, PETRI_PLACES=97, PETRI_TRANSITIONS=92} [2021-10-15 19:38:48,331 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 60 predicate places. [2021-10-15 19:38:48,331 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 92 transitions, 692 flow [2021-10-15 19:38:48,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.333333333333336) internal successors, (236), 6 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,331 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:48,331 INFO L254 CegarLoopForPetriNet]: trace histogram [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 19:38:48,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:48,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:48,555 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1005744700, now seen corresponding path program 1 times [2021-10-15 19:38:48,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:48,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767809212] [2021-10-15 19:38:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:48,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:48,563 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:48,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113590878] [2021-10-15 19:38:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:48,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:48,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:48,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:38:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 19:38:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:48,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:48,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767809212] [2021-10-15 19:38:48,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:48,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113590878] [2021-10-15 19:38:48,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113590878] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:38:48,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:38:48,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 19:38:48,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973201703] [2021-10-15 19:38:48,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:38:48,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:48,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:38:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:38:48,800 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2021-10-15 19:38:48,800 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 92 transitions, 692 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:48,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2021-10-15 19:38:48,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:48,897 INFO L129 PetriNetUnfolder]: 16/193 cut-off events. [2021-10-15 19:38:48,898 INFO L130 PetriNetUnfolder]: For 635/635 co-relation queries the response was YES. [2021-10-15 19:38:48,899 INFO L84 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 193 events. 16/193 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 484 event pairs, 0 based on Foata normal form. 2/195 useless extension candidates. Maximal degree in co-relation 648. Up to 54 conditions per place. [2021-10-15 19:38:48,900 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 53 selfloop transitions, 9 changer transitions 4/93 dead transitions. [2021-10-15 19:38:48,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 93 transitions, 811 flow [2021-10-15 19:38:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:38:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:38:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2021-10-15 19:38:48,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6574074074074074 [2021-10-15 19:38:48,902 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 213 transitions. [2021-10-15 19:38:48,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 213 transitions. [2021-10-15 19:38:48,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:48,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 213 transitions. [2021-10-15 19:38:48,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 35.5) internal successors, (213), 6 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:38:48,905 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:38:48,905 INFO L186 Difference]: Start difference. First operand has 97 places, 92 transitions, 692 flow. Second operand 6 states and 213 transitions. [2021-10-15 19:38:48,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 93 transitions, 811 flow [2021-10-15 19:38:48,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 93 transitions, 771 flow, removed 14 selfloop flow, removed 6 redundant places. [2021-10-15 19:38:48,916 INFO L242 Difference]: Finished difference. Result has 98 places, 82 transitions, 591 flow [2021-10-15 19:38:48,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=591, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2021-10-15 19:38:48,916 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 61 predicate places. [2021-10-15 19:38:48,917 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 591 flow [2021-10-15 19:38:48,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:48,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:48,917 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:48,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:49,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:49,143 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:49,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:49,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1990599685, now seen corresponding path program 2 times [2021-10-15 19:38:49,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:49,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140146963] [2021-10-15 19:38:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:49,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:49,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:49,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949459873] [2021-10-15 19:38:49,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:38:49,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:49,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:49,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:49,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:38:49,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:38:49,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:38:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-15 19:38:49,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:49,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:49,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140146963] [2021-10-15 19:38:49,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:49,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949459873] [2021-10-15 19:38:49,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949459873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:49,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:49,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:38:49,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124177355] [2021-10-15 19:38:49,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:38:49,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:38:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:38:49,666 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2021-10-15 19:38:49,667 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 591 flow. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:49,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:49,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2021-10-15 19:38:49,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:50,060 INFO L129 PetriNetUnfolder]: 21/235 cut-off events. [2021-10-15 19:38:50,060 INFO L130 PetriNetUnfolder]: For 590/590 co-relation queries the response was YES. [2021-10-15 19:38:50,061 INFO L84 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 235 events. 21/235 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 674 event pairs, 0 based on Foata normal form. 5/240 useless extension candidates. Maximal degree in co-relation 848. Up to 54 conditions per place. [2021-10-15 19:38:50,063 INFO L132 encePairwiseOnDemand]: 41/54 looper letters, 96 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2021-10-15 19:38:50,063 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 1199 flow [2021-10-15 19:38:50,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:38:50,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:38:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2021-10-15 19:38:50,065 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4511784511784512 [2021-10-15 19:38:50,065 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 268 transitions. [2021-10-15 19:38:50,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 268 transitions. [2021-10-15 19:38:50,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:50,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 268 transitions. [2021-10-15 19:38:50,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 24.363636363636363) internal successors, (268), 11 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,069 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,069 INFO L186 Difference]: Start difference. First operand has 98 places, 82 transitions, 591 flow. Second operand 11 states and 268 transitions. [2021-10-15 19:38:50,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 1199 flow [2021-10-15 19:38:50,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 144 transitions, 1158 flow, removed 17 selfloop flow, removed 4 redundant places. [2021-10-15 19:38:50,081 INFO L242 Difference]: Finished difference. Result has 104 places, 92 transitions, 775 flow [2021-10-15 19:38:50,081 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=775, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2021-10-15 19:38:50,081 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 67 predicate places. [2021-10-15 19:38:50,081 INFO L470 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 775 flow [2021-10-15 19:38:50,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,082 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:50,082 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:50,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:50,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:38:50,298 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 332875516, now seen corresponding path program 1 times [2021-10-15 19:38:50,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:50,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062051475] [2021-10-15 19:38:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:50,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:50,317 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:50,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922267024] [2021-10-15 19:38:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:50,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:50,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:50,324 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:50,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:38:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:38:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:50,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:50,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062051475] [2021-10-15 19:38:50,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:50,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922267024] [2021-10-15 19:38:50,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922267024] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:50,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:50,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:38:50,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172908896] [2021-10-15 19:38:50,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:38:50,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:38:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:38:50,654 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:50,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 775 flow. Second operand has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:50,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:50,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:50,715 INFO L129 PetriNetUnfolder]: 21/237 cut-off events. [2021-10-15 19:38:50,715 INFO L130 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2021-10-15 19:38:50,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 237 events. 21/237 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 676 event pairs, 0 based on Foata normal form. 1/238 useless extension candidates. Maximal degree in co-relation 755. Up to 37 conditions per place. [2021-10-15 19:38:50,718 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 13 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2021-10-15 19:38:50,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 95 transitions, 837 flow [2021-10-15 19:38:50,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:38:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:38:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 318 transitions. [2021-10-15 19:38:50,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2021-10-15 19:38:50,720 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 318 transitions. [2021-10-15 19:38:50,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 318 transitions. [2021-10-15 19:38:50,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:50,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 318 transitions. [2021-10-15 19:38:50,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.75) internal successors, (318), 8 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,724 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,724 INFO L186 Difference]: Start difference. First operand has 104 places, 92 transitions, 775 flow. Second operand 8 states and 318 transitions. [2021-10-15 19:38:50,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 95 transitions, 837 flow [2021-10-15 19:38:50,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 95 transitions, 737 flow, removed 24 selfloop flow, removed 7 redundant places. [2021-10-15 19:38:50,735 INFO L242 Difference]: Finished difference. Result has 106 places, 95 transitions, 724 flow [2021-10-15 19:38:50,735 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=724, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2021-10-15 19:38:50,735 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 69 predicate places. [2021-10-15 19:38:50,736 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 724 flow [2021-10-15 19:38:50,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:50,736 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:50,736 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 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 19:38:50,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:38:50,963 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:50,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1728467740, now seen corresponding path program 1 times [2021-10-15 19:38:50,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:50,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536891603] [2021-10-15 19:38:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:50,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:50,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:50,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88796586] [2021-10-15 19:38:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:50,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:50,978 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:51,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:38:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:51,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:38:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:51,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536891603] [2021-10-15 19:38:51,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:51,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88796586] [2021-10-15 19:38:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88796586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:51,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:51,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:38:51,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579165470] [2021-10-15 19:38:51,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:38:51,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:51,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:38:51,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:38:51,765 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:51,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:51,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:51,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:51,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:52,079 INFO L129 PetriNetUnfolder]: 36/331 cut-off events. [2021-10-15 19:38:52,080 INFO L130 PetriNetUnfolder]: For 874/874 co-relation queries the response was YES. [2021-10-15 19:38:52,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 331 events. 36/331 cut-off events. For 874/874 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1093 event pairs, 0 based on Foata normal form. 6/337 useless extension candidates. Maximal degree in co-relation 1209. Up to 138 conditions per place. [2021-10-15 19:38:52,086 INFO L132 encePairwiseOnDemand]: 39/54 looper letters, 110 selfloop transitions, 41 changer transitions 5/173 dead transitions. [2021-10-15 19:38:52,086 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 173 transitions, 1520 flow [2021-10-15 19:38:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:38:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:38:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 304 transitions. [2021-10-15 19:38:52,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43304843304843305 [2021-10-15 19:38:52,090 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 304 transitions. [2021-10-15 19:38:52,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 304 transitions. [2021-10-15 19:38:52,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:52,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 304 transitions. [2021-10-15 19:38:52,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 23.384615384615383) internal successors, (304), 13 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,097 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,097 INFO L186 Difference]: Start difference. First operand has 106 places, 95 transitions, 724 flow. Second operand 13 states and 304 transitions. [2021-10-15 19:38:52,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 173 transitions, 1520 flow [2021-10-15 19:38:52,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 173 transitions, 1503 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-10-15 19:38:52,114 INFO L242 Difference]: Finished difference. Result has 119 places, 125 transitions, 1135 flow [2021-10-15 19:38:52,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1135, PETRI_PLACES=119, PETRI_TRANSITIONS=125} [2021-10-15 19:38:52,115 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 82 predicate places. [2021-10-15 19:38:52,115 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 125 transitions, 1135 flow [2021-10-15 19:38:52,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,115 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:52,116 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:52,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:52,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:38:52,336 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:52,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1769158268, now seen corresponding path program 2 times [2021-10-15 19:38:52,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:52,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349170109] [2021-10-15 19:38:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:52,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:52,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:52,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076278159] [2021-10-15 19:38:52,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:38:52,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:52,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:52,359 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:38:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:38:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:38:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:38:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:52,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:52,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349170109] [2021-10-15 19:38:52,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:52,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076278159] [2021-10-15 19:38:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076278159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:52,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:52,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:38:52,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950743005] [2021-10-15 19:38:52,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:38:52,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:38:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:38:52,863 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:52,863 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 125 transitions, 1135 flow. Second operand has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 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 19:38:52,863 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:52,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:52,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:52,972 INFO L129 PetriNetUnfolder]: 34/325 cut-off events. [2021-10-15 19:38:52,972 INFO L130 PetriNetUnfolder]: For 1208/1208 co-relation queries the response was YES. [2021-10-15 19:38:52,975 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 325 events. 34/325 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1064 event pairs, 0 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1152. Up to 53 conditions per place. [2021-10-15 19:38:52,977 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 10 selfloop transitions, 9 changer transitions 0/122 dead transitions. [2021-10-15 19:38:52,978 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 122 transitions, 1144 flow [2021-10-15 19:38:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:38:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:38:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 357 transitions. [2021-10-15 19:38:52,981 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7345679012345679 [2021-10-15 19:38:52,981 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 357 transitions. [2021-10-15 19:38:52,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 357 transitions. [2021-10-15 19:38:52,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:52,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 357 transitions. [2021-10-15 19:38:52,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 39.666666666666664) internal successors, (357), 9 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,985 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:52,986 INFO L186 Difference]: Start difference. First operand has 119 places, 125 transitions, 1135 flow. Second operand 9 states and 357 transitions. [2021-10-15 19:38:52,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 122 transitions, 1144 flow [2021-10-15 19:38:53,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 122 transitions, 1106 flow, removed 16 selfloop flow, removed 2 redundant places. [2021-10-15 19:38:53,008 INFO L242 Difference]: Finished difference. Result has 126 places, 122 transitions, 1090 flow [2021-10-15 19:38:53,009 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1090, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2021-10-15 19:38:53,009 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 89 predicate places. [2021-10-15 19:38:53,010 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 1090 flow [2021-10-15 19:38:53,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 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 19:38:53,010 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:53,010 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 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 19:38:53,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:53,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-15 19:38:53,226 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:53,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:53,227 INFO L82 PathProgramCache]: Analyzing trace with hash -307935353, now seen corresponding path program 1 times [2021-10-15 19:38:53,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:53,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172552732] [2021-10-15 19:38:53,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:53,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:53,244 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:53,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216866870] [2021-10-15 19:38:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:53,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:53,246 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:53,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:38:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:38:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:38:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:38:53,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:53,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172552732] [2021-10-15 19:38:53,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:53,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216866870] [2021-10-15 19:38:53,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216866870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:53,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:53,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:38:53,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78721505] [2021-10-15 19:38:53,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:38:53,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:38:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:38:53,785 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:38:53,786 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 1090 flow. Second operand has 8 states, 8 states have (on average 39.375) internal successors, (315), 8 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:53,786 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:53,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:38:53,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:38:53,914 INFO L129 PetriNetUnfolder]: 31/318 cut-off events. [2021-10-15 19:38:53,914 INFO L130 PetriNetUnfolder]: For 1146/1146 co-relation queries the response was YES. [2021-10-15 19:38:53,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 318 events. 31/318 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1021 event pairs, 0 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 1120. Up to 47 conditions per place. [2021-10-15 19:38:53,945 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 9 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2021-10-15 19:38:53,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 122 transitions, 1128 flow [2021-10-15 19:38:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:38:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:38:53,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 436 transitions. [2021-10-15 19:38:53,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.734006734006734 [2021-10-15 19:38:53,947 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 436 transitions. [2021-10-15 19:38:53,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 436 transitions. [2021-10-15 19:38:53,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:38:53,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 436 transitions. [2021-10-15 19:38:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 39.63636363636363) internal successors, (436), 11 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:53,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:53,953 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:53,953 INFO L186 Difference]: Start difference. First operand has 126 places, 122 transitions, 1090 flow. Second operand 11 states and 436 transitions. [2021-10-15 19:38:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 122 transitions, 1128 flow [2021-10-15 19:38:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 122 transitions, 1108 flow, removed 2 selfloop flow, removed 7 redundant places. [2021-10-15 19:38:53,974 INFO L242 Difference]: Finished difference. Result has 131 places, 122 transitions, 1105 flow [2021-10-15 19:38:53,975 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1105, PETRI_PLACES=131, PETRI_TRANSITIONS=122} [2021-10-15 19:38:53,975 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 94 predicate places. [2021-10-15 19:38:53,976 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 122 transitions, 1105 flow [2021-10-15 19:38:53,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.375) internal successors, (315), 8 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:53,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:38:53,976 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:38:54,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:38:54,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:38:54,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:38:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:38:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash -78776294, now seen corresponding path program 3 times [2021-10-15 19:38:54,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:38:54,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523078812] [2021-10-15 19:38:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:38:54,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:38:54,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:38:54,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724695787] [2021-10-15 19:38:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:38:54,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:38:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:38:54,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:38:54,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:38:54,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:38:54,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:38:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:38:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:38:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-15 19:38:55,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:38:55,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523078812] [2021-10-15 19:38:55,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:38:55,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724695787] [2021-10-15 19:38:55,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724695787] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:38:55,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:38:55,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:38:55,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474619172] [2021-10-15 19:38:55,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:38:55,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:38:55,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:38:55,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:38:55,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:38:55,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 122 transitions, 1105 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:38:55,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:38:55,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:38:55,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:01,993 INFO L129 PetriNetUnfolder]: 31/304 cut-off events. [2021-10-15 19:39:01,993 INFO L130 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2021-10-15 19:39:01,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1338 conditions, 304 events. 31/304 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 931 event pairs, 0 based on Foata normal form. 7/311 useless extension candidates. Maximal degree in co-relation 1294. Up to 77 conditions per place. [2021-10-15 19:39:01,998 INFO L132 encePairwiseOnDemand]: 42/54 looper letters, 63 selfloop transitions, 53 changer transitions 0/132 dead transitions. [2021-10-15 19:39:01,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 132 transitions, 1387 flow [2021-10-15 19:39:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:39:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:39:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2021-10-15 19:39:02,001 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2021-10-15 19:39:02,002 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 148 transitions. [2021-10-15 19:39:02,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 148 transitions. [2021-10-15 19:39:02,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:02,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 148 transitions. [2021-10-15 19:39:02,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:02,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:39:02,008 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 54.0) internal successors, (378), 7 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 19:39:02,008 INFO L186 Difference]: Start difference. First operand has 131 places, 122 transitions, 1105 flow. Second operand 6 states and 148 transitions. [2021-10-15 19:39:02,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 132 transitions, 1387 flow [2021-10-15 19:39:02,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 132 transitions, 1356 flow, removed 6 selfloop flow, removed 8 redundant places. [2021-10-15 19:39:02,048 INFO L242 Difference]: Finished difference. Result has 123 places, 117 transitions, 1195 flow [2021-10-15 19:39:02,048 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1195, PETRI_PLACES=123, PETRI_TRANSITIONS=117} [2021-10-15 19:39:02,049 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 86 predicate places. [2021-10-15 19:39:02,049 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 117 transitions, 1195 flow [2021-10-15 19:39:02,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:02,050 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:02,050 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:02,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:02,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:39:02,275 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:02,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1736500463, now seen corresponding path program 2 times [2021-10-15 19:39:02,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:02,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529339228] [2021-10-15 19:39:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:02,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:02,298 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:02,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789811815] [2021-10-15 19:39:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:02,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:02,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:02,302 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:02,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:39:02,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:02,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:39:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:02,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:02,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529339228] [2021-10-15 19:39:02,898 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:02,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789811815] [2021-10-15 19:39:02,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789811815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:02,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:02,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:02,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420665102] [2021-10-15 19:39:02,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:02,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:02,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:39:02,904 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 1195 flow. Second operand has 8 states, 8 states have (on average 39.125) internal successors, (313), 8 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:02,904 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:02,904 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:39:02,904 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:03,013 INFO L129 PetriNetUnfolder]: 31/305 cut-off events. [2021-10-15 19:39:03,013 INFO L130 PetriNetUnfolder]: For 1586/1586 co-relation queries the response was YES. [2021-10-15 19:39:03,016 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1240 conditions, 305 events. 31/305 cut-off events. For 1586/1586 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 941 event pairs, 0 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 1195. Up to 53 conditions per place. [2021-10-15 19:39:03,019 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 17 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2021-10-15 19:39:03,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 118 transitions, 1264 flow [2021-10-15 19:39:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 397 transitions. [2021-10-15 19:39:03,021 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7351851851851852 [2021-10-15 19:39:03,021 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 397 transitions. [2021-10-15 19:39:03,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 397 transitions. [2021-10-15 19:39:03,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:03,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 397 transitions. [2021-10-15 19:39:03,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 39.7) internal successors, (397), 10 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,026 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 54.0) internal successors, (594), 11 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,027 INFO L186 Difference]: Start difference. First operand has 123 places, 117 transitions, 1195 flow. Second operand 10 states and 397 transitions. [2021-10-15 19:39:03,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 118 transitions, 1264 flow [2021-10-15 19:39:03,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 118 transitions, 1201 flow, removed 7 selfloop flow, removed 3 redundant places. [2021-10-15 19:39:03,053 INFO L242 Difference]: Finished difference. Result has 130 places, 118 transitions, 1173 flow [2021-10-15 19:39:03,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1173, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2021-10-15 19:39:03,055 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 93 predicate places. [2021-10-15 19:39:03,055 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 1173 flow [2021-10-15 19:39:03,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.125) internal successors, (313), 8 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:03,056 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:03,056 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:03,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:03,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:03,275 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2002321831, now seen corresponding path program 2 times [2021-10-15 19:39:03,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:03,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040220829] [2021-10-15 19:39:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:03,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:03,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:03,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632158039] [2021-10-15 19:39:03,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:03,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:03,302 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:03,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:39:03,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:03,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:39:03,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:04,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:04,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040220829] [2021-10-15 19:39:04,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:04,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632158039] [2021-10-15 19:39:04,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632158039] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:04,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:04,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:39:04,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874667700] [2021-10-15 19:39:04,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:39:04,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:04,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:39:04,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:39:04,575 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:04,575 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 1173 flow. Second operand has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:04,575 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:04,576 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:04,576 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:05,056 INFO L129 PetriNetUnfolder]: 41/375 cut-off events. [2021-10-15 19:39:05,057 INFO L130 PetriNetUnfolder]: For 1842/1842 co-relation queries the response was YES. [2021-10-15 19:39:05,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 375 events. 41/375 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1217 event pairs, 0 based on Foata normal form. 6/381 useless extension candidates. Maximal degree in co-relation 1645. Up to 192 conditions per place. [2021-10-15 19:39:05,064 INFO L132 encePairwiseOnDemand]: 40/54 looper letters, 130 selfloop transitions, 33 changer transitions 5/184 dead transitions. [2021-10-15 19:39:05,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 1941 flow [2021-10-15 19:39:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:39:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:39:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 323 transitions. [2021-10-15 19:39:05,066 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42724867724867727 [2021-10-15 19:39:05,067 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 323 transitions. [2021-10-15 19:39:05,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 323 transitions. [2021-10-15 19:39:05,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:05,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 323 transitions. [2021-10-15 19:39:05,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:05,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:05,072 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:05,073 INFO L186 Difference]: Start difference. First operand has 130 places, 118 transitions, 1173 flow. Second operand 14 states and 323 transitions. [2021-10-15 19:39:05,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 1941 flow [2021-10-15 19:39:05,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 184 transitions, 1923 flow, removed 1 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:05,101 INFO L242 Difference]: Finished difference. Result has 141 places, 135 transitions, 1455 flow [2021-10-15 19:39:05,102 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1455, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2021-10-15 19:39:05,102 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 104 predicate places. [2021-10-15 19:39:05,103 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 1455 flow [2021-10-15 19:39:05,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.11111111111111) internal successors, (181), 9 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:05,103 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:05,103 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:05,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:05,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:05,316 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:05,317 INFO L82 PathProgramCache]: Analyzing trace with hash 762563284, now seen corresponding path program 3 times [2021-10-15 19:39:05,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:05,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333751115] [2021-10-15 19:39:05,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:05,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:05,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:05,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113138922] [2021-10-15 19:39:05,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:05,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:05,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:05,334 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:05,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:39:05,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:39:05,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:39:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-15 19:39:06,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:06,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333751115] [2021-10-15 19:39:06,035 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:06,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113138922] [2021-10-15 19:39:06,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113138922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:06,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:06,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 19:39:06,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280373524] [2021-10-15 19:39:06,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:06,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:06,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:06,039 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:06,039 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 1455 flow. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:06,039 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:06,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:06,040 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:06,427 INFO L129 PetriNetUnfolder]: 42/379 cut-off events. [2021-10-15 19:39:06,427 INFO L130 PetriNetUnfolder]: For 2323/2323 co-relation queries the response was YES. [2021-10-15 19:39:06,431 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1835 conditions, 379 events. 42/379 cut-off events. For 2323/2323 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1274 event pairs, 0 based on Foata normal form. 8/387 useless extension candidates. Maximal degree in co-relation 1784. Up to 103 conditions per place. [2021-10-15 19:39:06,434 INFO L132 encePairwiseOnDemand]: 38/54 looper letters, 75 selfloop transitions, 62 changer transitions 13/166 dead transitions. [2021-10-15 19:39:06,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 166 transitions, 1935 flow [2021-10-15 19:39:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:39:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:39:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2021-10-15 19:39:06,437 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4175084175084175 [2021-10-15 19:39:06,437 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 248 transitions. [2021-10-15 19:39:06,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 248 transitions. [2021-10-15 19:39:06,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:06,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 248 transitions. [2021-10-15 19:39:06,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 22.545454545454547) internal successors, (248), 11 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:06,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:06,449 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 54.0) internal successors, (648), 12 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:06,449 INFO L186 Difference]: Start difference. First operand has 141 places, 135 transitions, 1455 flow. Second operand 11 states and 248 transitions. [2021-10-15 19:39:06,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 166 transitions, 1935 flow [2021-10-15 19:39:06,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 166 transitions, 1874 flow, removed 23 selfloop flow, removed 5 redundant places. [2021-10-15 19:39:06,489 INFO L242 Difference]: Finished difference. Result has 153 places, 140 transitions, 1674 flow [2021-10-15 19:39:06,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1398, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1674, PETRI_PLACES=153, PETRI_TRANSITIONS=140} [2021-10-15 19:39:06,491 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 116 predicate places. [2021-10-15 19:39:06,491 INFO L470 AbstractCegarLoop]: Abstraction has has 153 places, 140 transitions, 1674 flow [2021-10-15 19:39:06,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:06,492 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:06,492 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:06,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:06,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:06,710 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1005346468, now seen corresponding path program 2 times [2021-10-15 19:39:06,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:06,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584656032] [2021-10-15 19:39:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:06,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:06,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:06,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600823784] [2021-10-15 19:39:06,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:06,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:06,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:06,725 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:06,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:39:07,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 19:39:07,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:07,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:07,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584656032] [2021-10-15 19:39:07,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:07,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600823784] [2021-10-15 19:39:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600823784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:07,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:07,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:07,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305350435] [2021-10-15 19:39:07,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:07,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:07,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:07,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:07,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 54 [2021-10-15 19:39:07,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 140 transitions, 1674 flow. Second operand has 7 states, 7 states have (on average 33.57142857142857) internal successors, (235), 7 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:07,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:07,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 54 [2021-10-15 19:39:07,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:07,780 INFO L129 PetriNetUnfolder]: 26/346 cut-off events. [2021-10-15 19:39:07,781 INFO L130 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2021-10-15 19:39:07,784 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 346 events. 26/346 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1077 event pairs, 0 based on Foata normal form. 2/348 useless extension candidates. Maximal degree in co-relation 1684. Up to 76 conditions per place. [2021-10-15 19:39:07,787 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 93 selfloop transitions, 18 changer transitions 15/152 dead transitions. [2021-10-15 19:39:07,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 152 transitions, 2015 flow [2021-10-15 19:39:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:39:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:39:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 322 transitions. [2021-10-15 19:39:07,790 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6625514403292181 [2021-10-15 19:39:07,790 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 322 transitions. [2021-10-15 19:39:07,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 322 transitions. [2021-10-15 19:39:07,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:07,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 322 transitions. [2021-10-15 19:39:07,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 35.77777777777778) internal successors, (322), 9 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 19:39:07,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:07,812 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 54.0) internal successors, (540), 10 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:07,813 INFO L186 Difference]: Start difference. First operand has 153 places, 140 transitions, 1674 flow. Second operand 9 states and 322 transitions. [2021-10-15 19:39:07,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 152 transitions, 2015 flow [2021-10-15 19:39:07,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 152 transitions, 1922 flow, removed 39 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:07,848 INFO L242 Difference]: Finished difference. Result has 154 places, 124 transitions, 1438 flow [2021-10-15 19:39:07,849 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1421, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1438, PETRI_PLACES=154, PETRI_TRANSITIONS=124} [2021-10-15 19:39:07,849 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 117 predicate places. [2021-10-15 19:39:07,850 INFO L470 AbstractCegarLoop]: Abstraction has has 154 places, 124 transitions, 1438 flow [2021-10-15 19:39:07,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 33.57142857142857) internal successors, (235), 7 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:07,850 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:07,851 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:07,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:08,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-15 19:39:08,067 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:08,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1869464814, now seen corresponding path program 3 times [2021-10-15 19:39:08,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:08,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184354102] [2021-10-15 19:39:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:08,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:08,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:08,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769462528] [2021-10-15 19:39:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:08,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:08,082 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:08,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:39:08,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:39:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:39:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:39:08,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:08,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184354102] [2021-10-15 19:39:08,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:08,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769462528] [2021-10-15 19:39:08,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769462528] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:08,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:08,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:39:08,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631763225] [2021-10-15 19:39:08,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:39:08,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:08,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:39:08,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:08,779 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:08,779 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 124 transitions, 1438 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,780 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:08,780 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:08,780 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:09,085 INFO L129 PetriNetUnfolder]: 24/294 cut-off events. [2021-10-15 19:39:09,085 INFO L130 PetriNetUnfolder]: For 2439/2439 co-relation queries the response was YES. [2021-10-15 19:39:09,088 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1585 conditions, 294 events. 24/294 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 826 event pairs, 0 based on Foata normal form. 10/304 useless extension candidates. Maximal degree in co-relation 1527. Up to 77 conditions per place. [2021-10-15 19:39:09,090 INFO L132 encePairwiseOnDemand]: 39/54 looper letters, 59 selfloop transitions, 51 changer transitions 7/131 dead transitions. [2021-10-15 19:39:09,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 131 transitions, 1688 flow [2021-10-15 19:39:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:09,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2021-10-15 19:39:09,093 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41435185185185186 [2021-10-15 19:39:09,093 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 179 transitions. [2021-10-15 19:39:09,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 179 transitions. [2021-10-15 19:39:09,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:09,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 179 transitions. [2021-10-15 19:39:09,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:09,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:09,096 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:09,097 INFO L186 Difference]: Start difference. First operand has 154 places, 124 transitions, 1438 flow. Second operand 8 states and 179 transitions. [2021-10-15 19:39:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 131 transitions, 1688 flow [2021-10-15 19:39:09,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 131 transitions, 1613 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:09,125 INFO L242 Difference]: Finished difference. Result has 152 places, 117 transitions, 1458 flow [2021-10-15 19:39:09,126 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1458, PETRI_PLACES=152, PETRI_TRANSITIONS=117} [2021-10-15 19:39:09,126 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 115 predicate places. [2021-10-15 19:39:09,126 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 117 transitions, 1458 flow [2021-10-15 19:39:09,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:09,127 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:09,127 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:09,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:09,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 19:39:09,347 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:09,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:09,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1395693798, now seen corresponding path program 4 times [2021-10-15 19:39:09,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:09,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527224217] [2021-10-15 19:39:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:09,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:09,360 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:09,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545173967] [2021-10-15 19:39:09,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:09,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:09,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:09,362 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:09,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:39:09,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:09,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 19:39:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:10,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:10,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527224217] [2021-10-15 19:39:10,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:10,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545173967] [2021-10-15 19:39:10,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545173967] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:10,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:10,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:39:10,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277291527] [2021-10-15 19:39:10,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:39:10,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:39:10,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:39:10,923 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:10,924 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 117 transitions, 1458 flow. Second operand has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:10,924 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:10,924 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:10,925 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:11,616 INFO L129 PetriNetUnfolder]: 37/361 cut-off events. [2021-10-15 19:39:11,617 INFO L130 PetriNetUnfolder]: For 3549/3549 co-relation queries the response was YES. [2021-10-15 19:39:11,620 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 361 events. 37/361 cut-off events. For 3549/3549 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1170 event pairs, 0 based on Foata normal form. 2/363 useless extension candidates. Maximal degree in co-relation 1955. Up to 171 conditions per place. [2021-10-15 19:39:11,623 INFO L132 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 46 changer transitions 1/196 dead transitions. [2021-10-15 19:39:11,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 196 transitions, 2528 flow [2021-10-15 19:39:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:39:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:39:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 374 transitions. [2021-10-15 19:39:11,626 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2021-10-15 19:39:11,626 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 374 transitions. [2021-10-15 19:39:11,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 374 transitions. [2021-10-15 19:39:11,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:11,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 374 transitions. [2021-10-15 19:39:11,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 22.0) internal successors, (374), 17 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,632 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,632 INFO L186 Difference]: Start difference. First operand has 152 places, 117 transitions, 1458 flow. Second operand 17 states and 374 transitions. [2021-10-15 19:39:11,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 196 transitions, 2528 flow [2021-10-15 19:39:11,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 196 transitions, 2336 flow, removed 20 selfloop flow, removed 12 redundant places. [2021-10-15 19:39:11,672 INFO L242 Difference]: Finished difference. Result has 160 places, 147 transitions, 1918 flow [2021-10-15 19:39:11,672 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1918, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2021-10-15 19:39:11,673 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 123 predicate places. [2021-10-15 19:39:11,673 INFO L470 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 1918 flow [2021-10-15 19:39:11,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,674 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:11,674 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:11,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:11,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,887 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 62330478, now seen corresponding path program 3 times [2021-10-15 19:39:11,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:11,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800509581] [2021-10-15 19:39:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:11,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:11,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:11,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321267164] [2021-10-15 19:39:11,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:11,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:11,902 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:11,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 19:39:12,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:39:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 19:39:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-15 19:39:14,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:14,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800509581] [2021-10-15 19:39:14,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:14,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321267164] [2021-10-15 19:39:14,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321267164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:14,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:14,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:39:14,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92526531] [2021-10-15 19:39:14,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:14,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:14,807 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:14,807 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 147 transitions, 1918 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,807 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:14,807 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:14,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:30,967 INFO L129 PetriNetUnfolder]: 46/432 cut-off events. [2021-10-15 19:39:30,967 INFO L130 PetriNetUnfolder]: For 4193/4193 co-relation queries the response was YES. [2021-10-15 19:39:30,972 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 432 events. 46/432 cut-off events. For 4193/4193 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1555 event pairs, 0 based on Foata normal form. 1/433 useless extension candidates. Maximal degree in co-relation 2377. Up to 141 conditions per place. [2021-10-15 19:39:30,976 INFO L132 encePairwiseOnDemand]: 45/54 looper letters, 149 selfloop transitions, 36 changer transitions 3/202 dead transitions. [2021-10-15 19:39:30,977 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 2830 flow [2021-10-15 19:39:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2021-10-15 19:39:30,979 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2021-10-15 19:39:30,979 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 196 transitions. [2021-10-15 19:39:30,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 196 transitions. [2021-10-15 19:39:30,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:30,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 196 transitions. [2021-10-15 19:39:30,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.5) internal successors, (196), 8 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:30,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:30,982 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 54.0) internal successors, (486), 9 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:30,982 INFO L186 Difference]: Start difference. First operand has 160 places, 147 transitions, 1918 flow. Second operand 8 states and 196 transitions. [2021-10-15 19:39:30,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 2830 flow [2021-10-15 19:39:31,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 202 transitions, 2688 flow, removed 34 selfloop flow, removed 8 redundant places. [2021-10-15 19:39:31,024 INFO L242 Difference]: Finished difference. Result has 162 places, 153 transitions, 2004 flow [2021-10-15 19:39:31,025 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2004, PETRI_PLACES=162, PETRI_TRANSITIONS=153} [2021-10-15 19:39:31,025 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2021-10-15 19:39:31,025 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 153 transitions, 2004 flow [2021-10-15 19:39:31,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,026 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:31,026 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:31,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:31,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 19:39:31,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1931506154, now seen corresponding path program 1 times [2021-10-15 19:39:31,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:31,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370505536] [2021-10-15 19:39:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:31,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:31,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:31,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935564504] [2021-10-15 19:39:31,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:31,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:31,266 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:31,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 19:39:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:39:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:32,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:32,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370505536] [2021-10-15 19:39:32,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:32,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935564504] [2021-10-15 19:39:32,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935564504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:32,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:32,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:39:32,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936761386] [2021-10-15 19:39:32,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:39:32,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:39:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:39:32,095 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:39:32,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 153 transitions, 2004 flow. Second operand has 9 states, 9 states have (on average 39.55555555555556) internal successors, (356), 9 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:32,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:39:32,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:32,295 INFO L129 PetriNetUnfolder]: 42/420 cut-off events. [2021-10-15 19:39:32,295 INFO L130 PetriNetUnfolder]: For 3787/3787 co-relation queries the response was YES. [2021-10-15 19:39:32,299 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 420 events. 42/420 cut-off events. For 3787/3787 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1423 event pairs, 0 based on Foata normal form. 2/422 useless extension candidates. Maximal degree in co-relation 2076. Up to 82 conditions per place. [2021-10-15 19:39:32,303 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 11 selfloop transitions, 15 changer transitions 0/151 dead transitions. [2021-10-15 19:39:32,303 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 151 transitions, 2016 flow [2021-10-15 19:39:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:39:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:39:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 514 transitions. [2021-10-15 19:39:32,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7321937321937322 [2021-10-15 19:39:32,305 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 514 transitions. [2021-10-15 19:39:32,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 514 transitions. [2021-10-15 19:39:32,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:32,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 514 transitions. [2021-10-15 19:39:32,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 39.53846153846154) internal successors, (514), 13 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,310 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,311 INFO L186 Difference]: Start difference. First operand has 162 places, 153 transitions, 2004 flow. Second operand 13 states and 514 transitions. [2021-10-15 19:39:32,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 151 transitions, 2016 flow [2021-10-15 19:39:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 151 transitions, 1979 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-10-15 19:39:32,351 INFO L242 Difference]: Finished difference. Result has 171 places, 151 transitions, 1970 flow [2021-10-15 19:39:32,352 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1970, PETRI_PLACES=171, PETRI_TRANSITIONS=151} [2021-10-15 19:39:32,353 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 134 predicate places. [2021-10-15 19:39:32,353 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 151 transitions, 1970 flow [2021-10-15 19:39:32,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 39.55555555555556) internal successors, (356), 9 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:32,354 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:32,354 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:32,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:32,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 19:39:32,571 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:32,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1646664921, now seen corresponding path program 4 times [2021-10-15 19:39:32,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:32,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698680200] [2021-10-15 19:39:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:32,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:32,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:32,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303260587] [2021-10-15 19:39:32,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:32,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:32,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:32,595 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:32,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 19:39:33,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:39:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:34,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698680200] [2021-10-15 19:39:34,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:34,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303260587] [2021-10-15 19:39:34,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303260587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:34,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:34,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 19:39:34,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941526789] [2021-10-15 19:39:34,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:39:34,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:39:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:39:34,572 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:34,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 151 transitions, 1970 flow. Second operand has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:34,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:34,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:34,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:35,289 INFO L129 PetriNetUnfolder]: 46/473 cut-off events. [2021-10-15 19:39:35,290 INFO L130 PetriNetUnfolder]: For 4780/4780 co-relation queries the response was YES. [2021-10-15 19:39:35,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 473 events. 46/473 cut-off events. For 4780/4780 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1716 event pairs, 0 based on Foata normal form. 5/478 useless extension candidates. Maximal degree in co-relation 2640. Up to 231 conditions per place. [2021-10-15 19:39:35,299 INFO L132 encePairwiseOnDemand]: 40/54 looper letters, 150 selfloop transitions, 50 changer transitions 11/227 dead transitions. [2021-10-15 19:39:35,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 227 transitions, 2996 flow [2021-10-15 19:39:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-15 19:39:35,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-15 19:39:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 449 transitions. [2021-10-15 19:39:35,305 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3959435626102293 [2021-10-15 19:39:35,305 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 449 transitions. [2021-10-15 19:39:35,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 449 transitions. [2021-10-15 19:39:35,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:35,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 449 transitions. [2021-10-15 19:39:35,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 21.38095238095238) internal successors, (449), 21 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 54.0) internal successors, (1188), 22 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,313 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 54.0) internal successors, (1188), 22 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,314 INFO L186 Difference]: Start difference. First operand has 171 places, 151 transitions, 1970 flow. Second operand 21 states and 449 transitions. [2021-10-15 19:39:35,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 227 transitions, 2996 flow [2021-10-15 19:39:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 227 transitions, 2951 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-10-15 19:39:35,359 INFO L242 Difference]: Finished difference. Result has 188 places, 169 transitions, 2372 flow [2021-10-15 19:39:35,359 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2372, PETRI_PLACES=188, PETRI_TRANSITIONS=169} [2021-10-15 19:39:35,360 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 151 predicate places. [2021-10-15 19:39:35,360 INFO L470 AbstractCegarLoop]: Abstraction has has 188 places, 169 transitions, 2372 flow [2021-10-15 19:39:35,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,360 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:35,361 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:35,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-15 19:39:35,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 19:39:35,587 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1810613891, now seen corresponding path program 3 times [2021-10-15 19:39:35,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:35,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961275304] [2021-10-15 19:39:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:35,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:35,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:35,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531541113] [2021-10-15 19:39:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:35,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:35,606 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:35,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 19:39:36,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:39:36,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:39:36,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-15 19:39:36,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:36,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961275304] [2021-10-15 19:39:36,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:36,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531541113] [2021-10-15 19:39:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531541113] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:36,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:36,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:36,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052530117] [2021-10-15 19:39:36,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:36,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:36,833 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:36,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 169 transitions, 2372 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:36,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:36,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:36,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:37,220 INFO L129 PetriNetUnfolder]: 46/458 cut-off events. [2021-10-15 19:39:37,221 INFO L130 PetriNetUnfolder]: For 5478/5478 co-relation queries the response was YES. [2021-10-15 19:39:37,225 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2754 conditions, 458 events. 46/458 cut-off events. For 5478/5478 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1600 event pairs, 0 based on Foata normal form. 1/459 useless extension candidates. Maximal degree in co-relation 2685. Up to 139 conditions per place. [2021-10-15 19:39:37,229 INFO L132 encePairwiseOnDemand]: 42/54 looper letters, 80 selfloop transitions, 87 changer transitions 1/184 dead transitions. [2021-10-15 19:39:37,230 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 184 transitions, 2821 flow [2021-10-15 19:39:37,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:39:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:39:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 256 transitions. [2021-10-15 19:39:37,232 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3646723646723647 [2021-10-15 19:39:37,232 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 256 transitions. [2021-10-15 19:39:37,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 256 transitions. [2021-10-15 19:39:37,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:37,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 256 transitions. [2021-10-15 19:39:37,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 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 19:39:37,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,236 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 54.0) internal successors, (756), 14 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,237 INFO L186 Difference]: Start difference. First operand has 188 places, 169 transitions, 2372 flow. Second operand 13 states and 256 transitions. [2021-10-15 19:39:37,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 184 transitions, 2821 flow [2021-10-15 19:39:37,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 184 transitions, 2664 flow, removed 58 selfloop flow, removed 10 redundant places. [2021-10-15 19:39:37,293 INFO L242 Difference]: Finished difference. Result has 195 places, 175 transitions, 2524 flow [2021-10-15 19:39:37,293 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2524, PETRI_PLACES=195, PETRI_TRANSITIONS=175} [2021-10-15 19:39:37,294 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 158 predicate places. [2021-10-15 19:39:37,294 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 175 transitions, 2524 flow [2021-10-15 19:39:37,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,295 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:37,295 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:37,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:37,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 19:39:37,523 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1696816334, now seen corresponding path program 5 times [2021-10-15 19:39:37,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:37,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651146729] [2021-10-15 19:39:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:37,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:37,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:37,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207392312] [2021-10-15 19:39:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:37,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:37,537 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:37,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:39:38,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:39:38,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:39:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:38,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651146729] [2021-10-15 19:39:38,479 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:38,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207392312] [2021-10-15 19:39:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207392312] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:38,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:38,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:39:38,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722687393] [2021-10-15 19:39:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:39:38,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:38,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:39:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:39:38,482 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:39:38,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 175 transitions, 2524 flow. Second operand has 11 states, 11 states have (on average 39.54545454545455) internal successors, (435), 11 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:38,484 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:39:38,484 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:38,713 INFO L129 PetriNetUnfolder]: 34/401 cut-off events. [2021-10-15 19:39:38,713 INFO L130 PetriNetUnfolder]: For 5557/5557 co-relation queries the response was YES. [2021-10-15 19:39:38,716 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 401 events. 34/401 cut-off events. For 5557/5557 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1156 event pairs, 0 based on Foata normal form. 6/407 useless extension candidates. Maximal degree in co-relation 2248. Up to 64 conditions per place. [2021-10-15 19:39:38,720 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 10 selfloop transitions, 22 changer transitions 12/159 dead transitions. [2021-10-15 19:39:38,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 159 transitions, 2319 flow [2021-10-15 19:39:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-15 19:39:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-15 19:39:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 673 transitions. [2021-10-15 19:39:38,727 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7331154684095861 [2021-10-15 19:39:38,727 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 673 transitions. [2021-10-15 19:39:38,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 673 transitions. [2021-10-15 19:39:38,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:38,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 673 transitions. [2021-10-15 19:39:38,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 39.588235294117645) internal successors, (673), 17 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,733 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,733 INFO L186 Difference]: Start difference. First operand has 195 places, 175 transitions, 2524 flow. Second operand 17 states and 673 transitions. [2021-10-15 19:39:38,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 159 transitions, 2319 flow [2021-10-15 19:39:38,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 159 transitions, 2125 flow, removed 53 selfloop flow, removed 9 redundant places. [2021-10-15 19:39:38,775 INFO L242 Difference]: Finished difference. Result has 201 places, 147 transitions, 1940 flow [2021-10-15 19:39:38,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1940, PETRI_PLACES=201, PETRI_TRANSITIONS=147} [2021-10-15 19:39:38,778 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 164 predicate places. [2021-10-15 19:39:38,779 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 147 transitions, 1940 flow [2021-10-15 19:39:38,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 39.54545454545455) internal successors, (435), 11 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:38,779 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:38,779 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:38,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:39,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 19:39:39,003 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 38042175, now seen corresponding path program 5 times [2021-10-15 19:39:39,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:39,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478769080] [2021-10-15 19:39:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:39,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:39,019 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:39,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688137794] [2021-10-15 19:39:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:39,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:39,021 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:39,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 19:39:39,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-15 19:39:39,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:39,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:39,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:39,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478769080] [2021-10-15 19:39:39,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:39,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688137794] [2021-10-15 19:39:39,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688137794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:39,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:39,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:39:39,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259448039] [2021-10-15 19:39:39,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:39:39,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:39:39,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:39:39,912 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 54 [2021-10-15 19:39:39,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 147 transitions, 1940 flow. Second operand has 12 states, 12 states have (on average 39.166666666666664) internal successors, (470), 12 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:39,913 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 54 [2021-10-15 19:39:39,913 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:40,135 INFO L129 PetriNetUnfolder]: 34/404 cut-off events. [2021-10-15 19:39:40,135 INFO L130 PetriNetUnfolder]: For 4976/4976 co-relation queries the response was YES. [2021-10-15 19:39:40,137 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2247 conditions, 404 events. 34/404 cut-off events. For 4976/4976 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1290 event pairs, 0 based on Foata normal form. 5/409 useless extension candidates. Maximal degree in co-relation 2177. Up to 60 conditions per place. [2021-10-15 19:39:40,140 INFO L132 encePairwiseOnDemand]: 49/54 looper letters, 17 selfloop transitions, 20 changer transitions 0/153 dead transitions. [2021-10-15 19:39:40,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 153 transitions, 2086 flow [2021-10-15 19:39:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:39:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:39:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 636 transitions. [2021-10-15 19:39:40,142 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7361111111111112 [2021-10-15 19:39:40,142 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 636 transitions. [2021-10-15 19:39:40,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 636 transitions. [2021-10-15 19:39:40,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:40,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 636 transitions. [2021-10-15 19:39:40,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 39.75) internal successors, (636), 16 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 54.0) internal successors, (918), 17 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,158 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 54.0) internal successors, (918), 17 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,158 INFO L186 Difference]: Start difference. First operand has 201 places, 147 transitions, 1940 flow. Second operand 16 states and 636 transitions. [2021-10-15 19:39:40,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 153 transitions, 2086 flow [2021-10-15 19:39:40,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 153 transitions, 1902 flow, removed 72 selfloop flow, removed 23 redundant places. [2021-10-15 19:39:40,200 INFO L242 Difference]: Finished difference. Result has 187 places, 153 transitions, 1895 flow [2021-10-15 19:39:40,225 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1895, PETRI_PLACES=187, PETRI_TRANSITIONS=153} [2021-10-15 19:39:40,225 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 150 predicate places. [2021-10-15 19:39:40,225 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 153 transitions, 1895 flow [2021-10-15 19:39:40,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 39.166666666666664) internal successors, (470), 12 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,226 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:40,226 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:40,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:40,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:40,427 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1178568761, now seen corresponding path program 4 times [2021-10-15 19:39:40,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:40,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579824258] [2021-10-15 19:39:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:40,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:40,440 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:40,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238834381] [2021-10-15 19:39:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:40,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:40,442 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:40,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 19:39:41,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-15 19:39:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:42,141 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:42,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:42,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579824258] [2021-10-15 19:39:42,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:42,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238834381] [2021-10-15 19:39:42,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238834381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:42,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:42,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:39:42,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555963055] [2021-10-15 19:39:42,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:39:42,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:39:42,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:39:42,146 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:42,147 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 153 transitions, 1895 flow. Second operand has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 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 19:39:42,147 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:42,147 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:42,147 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:42,875 INFO L129 PetriNetUnfolder]: 34/411 cut-off events. [2021-10-15 19:39:42,876 INFO L130 PetriNetUnfolder]: For 4562/4562 co-relation queries the response was YES. [2021-10-15 19:39:42,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2373 conditions, 411 events. 34/411 cut-off events. For 4562/4562 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1358 event pairs, 0 based on Foata normal form. 1/412 useless extension candidates. Maximal degree in co-relation 2309. Up to 190 conditions per place. [2021-10-15 19:39:42,881 INFO L132 encePairwiseOnDemand]: 42/54 looper letters, 144 selfloop transitions, 39 changer transitions 6/210 dead transitions. [2021-10-15 19:39:42,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 210 transitions, 2594 flow [2021-10-15 19:39:42,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:39:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:39:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 473 transitions. [2021-10-15 19:39:42,887 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2021-10-15 19:39:42,887 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 473 transitions. [2021-10-15 19:39:42,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 473 transitions. [2021-10-15 19:39:42,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:42,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 473 transitions. [2021-10-15 19:39:42,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 21.5) internal successors, (473), 22 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 54.0) internal successors, (1242), 23 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,893 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 54.0) internal successors, (1242), 23 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:42,893 INFO L186 Difference]: Start difference. First operand has 187 places, 153 transitions, 1895 flow. Second operand 22 states and 473 transitions. [2021-10-15 19:39:42,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 210 transitions, 2594 flow [2021-10-15 19:39:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 210 transitions, 2579 flow, removed 0 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:42,926 INFO L242 Difference]: Finished difference. Result has 207 places, 161 transitions, 2075 flow [2021-10-15 19:39:42,927 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2075, PETRI_PLACES=207, PETRI_TRANSITIONS=161} [2021-10-15 19:39:42,927 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 170 predicate places. [2021-10-15 19:39:42,928 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 161 transitions, 2075 flow [2021-10-15 19:39:42,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.23076923076923) internal successors, (276), 13 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 19:39:42,928 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:42,928 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:42,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:43,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:43,148 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:43,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1490592583, now seen corresponding path program 6 times [2021-10-15 19:39:43,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:43,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929480465] [2021-10-15 19:39:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:43,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:43,164 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:43,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434848133] [2021-10-15 19:39:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:43,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:43,166 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:43,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 19:39:43,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-15 19:39:43,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 19:39:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 95 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-10-15 19:39:47,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:47,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929480465] [2021-10-15 19:39:47,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:47,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434848133] [2021-10-15 19:39:47,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434848133] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:47,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:47,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:39:47,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715482425] [2021-10-15 19:39:47,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:39:47,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:47,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:39:47,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2021-10-15 19:39:47,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2021-10-15 19:39:47,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 161 transitions, 2075 flow. Second operand has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:47,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:47,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2021-10-15 19:39:47,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:36,243 INFO L129 PetriNetUnfolder]: 34/389 cut-off events. [2021-10-15 19:40:36,244 INFO L130 PetriNetUnfolder]: For 5087/5087 co-relation queries the response was YES. [2021-10-15 19:40:36,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2378 conditions, 389 events. 34/389 cut-off events. For 5087/5087 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1181 event pairs, 0 based on Foata normal form. 8/397 useless extension candidates. Maximal degree in co-relation 2307. Up to 113 conditions per place. [2021-10-15 19:40:36,246 INFO L132 encePairwiseOnDemand]: 44/54 looper letters, 0 selfloop transitions, 0 changer transitions 174/174 dead transitions. [2021-10-15 19:40:36,246 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 174 transitions, 2437 flow [2021-10-15 19:40:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:40:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:40:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2021-10-15 19:40:36,248 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.39021164021164023 [2021-10-15 19:40:36,248 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 295 transitions. [2021-10-15 19:40:36,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 295 transitions. [2021-10-15 19:40:36,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:40:36,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 295 transitions. [2021-10-15 19:40:36,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 21.071428571428573) internal successors, (295), 14 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:36,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:36,250 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:36,250 INFO L186 Difference]: Start difference. First operand has 207 places, 161 transitions, 2075 flow. Second operand 14 states and 295 transitions. [2021-10-15 19:40:36,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 174 transitions, 2437 flow [2021-10-15 19:40:36,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 174 transitions, 2381 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-10-15 19:40:36,274 INFO L242 Difference]: Finished difference. Result has 203 places, 0 transitions, 0 flow [2021-10-15 19:40:36,274 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=0, PETRI_PLACES=203, PETRI_TRANSITIONS=0} [2021-10-15 19:40:36,274 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 166 predicate places. [2021-10-15 19:40:36,275 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 0 transitions, 0 flow [2021-10-15 19:40:36,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:36,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,277 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,278 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:40:36,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-15 19:40:36,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:40:36,483 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:40:36,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:40:36 BoogieIcfgContainer [2021-10-15 19:40:36,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:40:36,487 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:40:36,487 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:40:36,487 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:40:36,488 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:38:41" (3/4) ... [2021-10-15 19:40:36,491 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:40:36,502 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-15 19:40:36,502 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:40:36,503 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:40:36,503 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:40:36,540 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:40:36,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:40:36,545 INFO L168 Benchmark]: Toolchain (without parser) took 115880.80 ms. Allocated memory was 81.8 MB in the beginning and 255.9 MB in the end (delta: 174.1 MB). Free memory was 48.0 MB in the beginning and 125.0 MB in the end (delta: -77.0 MB). Peak memory consumption was 95.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,545 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 52.0 MB in the beginning and 52.0 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:36,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.23 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 47.9 MB in the beginning and 84.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 109.1 MB. Free memory was 84.5 MB in the beginning and 83.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:40:36,547 INFO L168 Benchmark]: Boogie Preprocessor took 43.91 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 81.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,547 INFO L168 Benchmark]: RCFGBuilder took 458.87 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 70.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,548 INFO L168 Benchmark]: TraceAbstraction took 114936.81 ms. Allocated memory was 109.1 MB in the beginning and 255.9 MB in the end (delta: 146.8 MB). Free memory was 69.8 MB in the beginning and 129.1 MB in the end (delta: -59.3 MB). Peak memory consumption was 90.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,554 INFO L168 Benchmark]: Witness Printer took 55.95 ms. Allocated memory is still 255.9 MB. Free memory was 128.0 MB in the beginning and 125.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:40:36,557 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 81.8 MB. Free memory was 52.0 MB in the beginning and 52.0 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 323.23 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 47.9 MB in the beginning and 84.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.65 ms. Allocated memory is still 109.1 MB. Free memory was 84.5 MB in the beginning and 83.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.91 ms. Allocated memory is still 109.1 MB. Free memory was 83.0 MB in the beginning and 81.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 458.87 ms. Allocated memory is still 109.1 MB. Free memory was 81.9 MB in the beginning and 70.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 114936.81 ms. Allocated memory was 109.1 MB in the beginning and 255.9 MB in the end (delta: 146.8 MB). Free memory was 69.8 MB in the beginning and 129.1 MB in the end (delta: -59.3 MB). Peak memory consumption was 90.0 MB. Max. memory is 16.1 GB. * Witness Printer took 55.95 ms. Allocated memory is still 255.9 MB. Free memory was 128.0 MB in the beginning and 125.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 114833.4ms, OverallIterations: 32, TraceHistogramMax: 7, EmptinessCheckTime: 0.0ms, AutomataDifference: 81000.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 84.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 316 SDtfs, 1281 SDslu, 580 SDs, 0 SdLazy, 3517 SolverSat, 681 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 41145.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1403 GetRequests, 1101 SyntacticMatches, 6 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 40582.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2524occurred in iteration=28, InterpolantAutomatonStates: 325, 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: 308.2ms SsaConstructionTime, 876.0ms SatisfiabilityAnalysisTime, 15984.6ms InterpolantComputationTime, 1305 NumberOfCodeBlocks, 1106 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1273 ConstructedInterpolants, 0 QuantifiedInterpolants, 8197 SizeOfPredicates, 190 NumberOfNonLiveVariables, 4422 ConjunctsInSsa, 516 ConjunctsInUnsatCore, 32 InterpolantComputations, 10 PerfectInterpolantSequences, 397/1263 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:40:36,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb09d0b2-ad92-4ff3-bb50-cf1a477bb001/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...