./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/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_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/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_97f810e6-928f-4f0a-bc63-9c885520aa5d/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 519a8ae0e90f59a92a96e1769439084ba865f68b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:39:05,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:39:05,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:39:05,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:39:05,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:39:05,263 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:39:05,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:39:05,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:39:05,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:39:05,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:39:05,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:39:05,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:39:05,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:39:05,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:39:05,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:39:05,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:39:05,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:39:05,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:39:05,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:39:05,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:39:05,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:39:05,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:39:05,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:39:05,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:39:05,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:39:05,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:39:05,333 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:39:05,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:39:05,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:39:05,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:39:05,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:39:05,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:39:05,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:39:05,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:39:05,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:39:05,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:39:05,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:39:05,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:39:05,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:39:05,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:39:05,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:39:05,353 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:39:05,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:39:05,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:39:05,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:39:05,420 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:39:05,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:39:05,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:39:05,423 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:39:05,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:39:05,423 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:39:05,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:39:05,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:39:05,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:39:05,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:39:05,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:39:05,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:39:05,426 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:39:05,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:39:05,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:39:05,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:39:05,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:39:05,428 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:39:05,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:39:05,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:05,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:39:05,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:39:05,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:39:05,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:39:05,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:39:05,430 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:39:05,430 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:39:05,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:39:05,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:39:05,431 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_97f810e6-928f-4f0a-bc63-9c885520aa5d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 519a8ae0e90f59a92a96e1769439084ba865f68b [2021-10-15 19:39:05,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:39:05,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:39:05,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:39:05,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:39:05,808 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:39:05,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-10-15 19:39:05,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/data/e91f87caf/191cb745a6104ed2945b9d21464ce348/FLAGaffc573b0 [2021-10-15 19:39:06,471 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:39:06,472 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-10-15 19:39:06,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/data/e91f87caf/191cb745a6104ed2945b9d21464ce348/FLAGaffc573b0 [2021-10-15 19:39:06,803 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/data/e91f87caf/191cb745a6104ed2945b9d21464ce348 [2021-10-15 19:39:06,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:39:06,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:39:06,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:06,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:39:06,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:39:06,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:06" (1/1) ... [2021-10-15 19:39:06,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ebf5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:06, skipping insertion in model container [2021-10-15 19:39:06,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:39:06" (1/1) ... [2021-10-15 19:39:06,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:39:06,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:39:07,074 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_97f810e6-928f-4f0a-bc63-9c885520aa5d/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2021-10-15 19:39:07,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:07,107 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:39:07,123 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_97f810e6-928f-4f0a-bc63-9c885520aa5d/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2021-10-15 19:39:07,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:39:07,151 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:39:07,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07 WrapperNode [2021-10-15 19:39:07,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:39:07,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:07,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:39:07,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:39:07,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:39:07,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:39:07,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:39:07,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:39:07,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:39:07,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:39:07,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:39:07,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:39:07,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (1/1) ... [2021-10-15 19:39:07,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:39:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:07,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:39:07,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:39:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:39:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:39:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:39:07,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:39:07,700 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:39:07,701 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-10-15 19:39:07,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:07 BoogieIcfgContainer [2021-10-15 19:39:07,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:39:07,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:39:07,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:39:07,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:39:07,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:39:06" (1/3) ... [2021-10-15 19:39:07,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a4d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:07, skipping insertion in model container [2021-10-15 19:39:07,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:39:07" (2/3) ... [2021-10-15 19:39:07,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a4d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:39:07, skipping insertion in model container [2021-10-15 19:39:07,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:07" (3/3) ... [2021-10-15 19:39:07,743 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2021-10-15 19:39:07,750 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:39:07,750 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:39:07,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:39:07,832 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 19:39:07,832 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:39:07,847 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 44 places, 58 transitions, 116 flow [2021-10-15 19:39:07,884 INFO L129 PetriNetUnfolder]: 15/58 cut-off events. [2021-10-15 19:39:07,884 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:07,887 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 58 events. 15/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:39:07,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 58 transitions, 116 flow [2021-10-15 19:39:07,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 53 transitions, 106 flow [2021-10-15 19:39:07,904 INFO L129 PetriNetUnfolder]: 6/23 cut-off events. [2021-10-15 19:39:07,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:07,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:07,919 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:07,919 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1963072454, now seen corresponding path program 1 times [2021-10-15 19:39:07,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:07,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034168600] [2021-10-15 19:39:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:07,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:08,244 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 19:39:08,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:08,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034168600] [2021-10-15 19:39:08,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034168600] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:08,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:08,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:39:08,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599370287] [2021-10-15 19:39:08,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:39:08,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:39:08,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:39:08,305 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 58 [2021-10-15 19:39:08,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 53 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:08,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 58 [2021-10-15 19:39:08,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:08,346 INFO L129 PetriNetUnfolder]: 2/41 cut-off events. [2021-10-15 19:39:08,350 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:08,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 41 events. 2/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 11/44 useless extension candidates. Maximal degree in co-relation 41. Up to 3 conditions per place. [2021-10-15 19:39:08,355 INFO L132 encePairwiseOnDemand]: 46/58 looper letters, 0 selfloop transitions, 0 changer transitions 0/41 dead transitions. [2021-10-15 19:39:08,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 41 transitions, 82 flow [2021-10-15 19:39:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:39:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:39:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 102 transitions. [2021-10-15 19:39:08,374 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8793103448275862 [2021-10-15 19:39:08,375 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 102 transitions. [2021-10-15 19:39:08,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 102 transitions. [2021-10-15 19:39:08,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:08,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 102 transitions. [2021-10-15 19:39:08,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,395 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,398 INFO L186 Difference]: Start difference. First operand has 40 places, 53 transitions, 106 flow. Second operand 2 states and 102 transitions. [2021-10-15 19:39:08,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 41 transitions, 82 flow [2021-10-15 19:39:08,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 82 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:39:08,410 INFO L242 Difference]: Finished difference. Result has 41 places, 41 transitions, 82 flow [2021-10-15 19:39:08,413 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2021-10-15 19:39:08,414 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2021-10-15 19:39:08,416 INFO L470 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 82 flow [2021-10-15 19:39:08,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 46.0) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:08,417 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:08,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:39:08,418 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 19:39:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1281167042, now seen corresponding path program 1 times [2021-10-15 19:39:08,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:08,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018315377] [2021-10-15 19:39:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:08,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:08,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:08,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416822329] [2021-10-15 19:39:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:08,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:08,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:08,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:08,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:39:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:39:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:08,842 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 19:39:08,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:08,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018315377] [2021-10-15 19:39:08,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:08,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416822329] [2021-10-15 19:39:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416822329] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:08,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:08,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:39:08,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520331896] [2021-10-15 19:39:08,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:39:08,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:39:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:39:08,850 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:08,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:08,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:08,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:08,968 INFO L129 PetriNetUnfolder]: 3/68 cut-off events. [2021-10-15 19:39:08,968 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:39:08,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 68 events. 3/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 112. Up to 25 conditions per place. [2021-10-15 19:39:08,970 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 38 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2021-10-15 19:39:08,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 210 flow [2021-10-15 19:39:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:39:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:39:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2021-10-15 19:39:08,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2021-10-15 19:39:08,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 126 transitions. [2021-10-15 19:39:08,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 126 transitions. [2021-10-15 19:39:08,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:08,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 126 transitions. [2021-10-15 19:39:08,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,979 INFO L186 Difference]: Start difference. First operand has 41 places, 41 transitions, 82 flow. Second operand 4 states and 126 transitions. [2021-10-15 19:39:08,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 210 flow [2021-10-15 19:39:08,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:39:08,984 INFO L242 Difference]: Finished difference. Result has 46 places, 46 transitions, 128 flow [2021-10-15 19:39:08,984 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2021-10-15 19:39:08,985 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2021-10-15 19:39:08,985 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 128 flow [2021-10-15 19:39:08,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:08,986 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:08,986 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:09,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:09,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:09,202 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1454243009, now seen corresponding path program 1 times [2021-10-15 19:39:09,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:09,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449370007] [2021-10-15 19:39:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:09,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:09,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:09,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701795156] [2021-10-15 19:39:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:09,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:09,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:09,250 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:09,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:39:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:09,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:09,685 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 19:39:09,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:09,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449370007] [2021-10-15 19:39:09,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:09,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701795156] [2021-10-15 19:39:09,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701795156] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:09,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:09,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:39:09,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837323087] [2021-10-15 19:39:09,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:09,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:09,691 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:39:09,692 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 128 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:09,692 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:09,693 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:39:09,693 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:10,004 INFO L129 PetriNetUnfolder]: 3/66 cut-off events. [2021-10-15 19:39:10,005 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 19:39:10,006 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 66 events. 3/66 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 138. Up to 26 conditions per place. [2021-10-15 19:39:10,007 INFO L132 encePairwiseOnDemand]: 48/58 looper letters, 45 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2021-10-15 19:39:10,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 268 flow [2021-10-15 19:39:10,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:39:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:39:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2021-10-15 19:39:10,011 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2950191570881226 [2021-10-15 19:39:10,011 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 154 transitions. [2021-10-15 19:39:10,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 154 transitions. [2021-10-15 19:39:10,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:10,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 154 transitions. [2021-10-15 19:39:10,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.11111111111111) internal successors, (154), 9 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:10,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:10,017 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:10,017 INFO L186 Difference]: Start difference. First operand has 46 places, 46 transitions, 128 flow. Second operand 9 states and 154 transitions. [2021-10-15 19:39:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 268 flow [2021-10-15 19:39:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:39:10,023 INFO L242 Difference]: Finished difference. Result has 54 places, 47 transitions, 152 flow [2021-10-15 19:39:10,023 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=152, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2021-10-15 19:39:10,024 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2021-10-15 19:39:10,024 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 152 flow [2021-10-15 19:39:10,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:10,025 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:10,025 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:10,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:10,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:10,238 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:10,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1663317220, now seen corresponding path program 1 times [2021-10-15 19:39:10,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:10,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139833936] [2021-10-15 19:39:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:10,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:10,262 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:10,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732829866] [2021-10-15 19:39:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:10,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:10,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:10,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:39:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:10,819 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 19:39:10,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139833936] [2021-10-15 19:39:10,820 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:10,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732829866] [2021-10-15 19:39:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732829866] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:10,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:10,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:39:10,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583572091] [2021-10-15 19:39:10,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:10,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:10,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:10,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:10,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:39:10,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 19:39:10,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:10,826 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:39:10,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:11,093 INFO L129 PetriNetUnfolder]: 5/116 cut-off events. [2021-10-15 19:39:11,095 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-10-15 19:39:11,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 116 events. 5/116 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 303 event pairs, 0 based on Foata normal form. 2/104 useless extension candidates. Maximal degree in co-relation 267. Up to 49 conditions per place. [2021-10-15 19:39:11,102 INFO L132 encePairwiseOnDemand]: 44/58 looper letters, 51 selfloop transitions, 14 changer transitions 4/77 dead transitions. [2021-10-15 19:39:11,102 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 400 flow [2021-10-15 19:39:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:39:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:39:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2021-10-15 19:39:11,112 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.28213166144200624 [2021-10-15 19:39:11,112 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 180 transitions. [2021-10-15 19:39:11,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 180 transitions. [2021-10-15 19:39:11,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:11,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 180 transitions. [2021-10-15 19:39:11,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,128 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,128 INFO L186 Difference]: Start difference. First operand has 54 places, 47 transitions, 152 flow. Second operand 11 states and 180 transitions. [2021-10-15 19:39:11,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 400 flow [2021-10-15 19:39:11,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 387 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:11,138 INFO L242 Difference]: Finished difference. Result has 61 places, 54 transitions, 228 flow [2021-10-15 19:39:11,138 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=228, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2021-10-15 19:39:11,139 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 21 predicate places. [2021-10-15 19:39:11,139 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 228 flow [2021-10-15 19:39:11,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 19:39:11,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:11,140 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:11,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:11,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,366 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:11,374 INFO L82 PathProgramCache]: Analyzing trace with hash 850548497, now seen corresponding path program 1 times [2021-10-15 19:39:11,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:11,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401745498] [2021-10-15 19:39:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:11,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:11,393 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:11,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783037133] [2021-10-15 19:39:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:11,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:11,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:11,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:39:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:39:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:11,610 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 19:39:11,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:11,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401745498] [2021-10-15 19:39:11,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:11,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783037133] [2021-10-15 19:39:11,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783037133] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:11,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:11,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:39:11,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446977478] [2021-10-15 19:39:11,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:39:11,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:39:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:39:11,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2021-10-15 19:39:11,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:11,615 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2021-10-15 19:39:11,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:11,722 INFO L129 PetriNetUnfolder]: 5/106 cut-off events. [2021-10-15 19:39:11,722 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-10-15 19:39:11,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 106 events. 5/106 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 247 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 274. Up to 47 conditions per place. [2021-10-15 19:39:11,725 INFO L132 encePairwiseOnDemand]: 54/58 looper letters, 34 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2021-10-15 19:39:11,725 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 300 flow [2021-10-15 19:39:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:39:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:39:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2021-10-15 19:39:11,728 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4224137931034483 [2021-10-15 19:39:11,728 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 98 transitions. [2021-10-15 19:39:11,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 98 transitions. [2021-10-15 19:39:11,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:11,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 98 transitions. [2021-10-15 19:39:11,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,736 INFO L186 Difference]: Start difference. First operand has 61 places, 54 transitions, 228 flow. Second operand 4 states and 98 transitions. [2021-10-15 19:39:11,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 300 flow [2021-10-15 19:39:11,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 287 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:11,752 INFO L242 Difference]: Finished difference. Result has 56 places, 52 transitions, 219 flow [2021-10-15 19:39:11,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2021-10-15 19:39:11,753 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 16 predicate places. [2021-10-15 19:39:11,753 INFO L470 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 219 flow [2021-10-15 19:39:11,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:11,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:11,754 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:11,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:11,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,962 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:11,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:11,962 INFO L82 PathProgramCache]: Analyzing trace with hash 598788611, now seen corresponding path program 1 times [2021-10-15 19:39:11,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:11,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977219867] [2021-10-15 19:39:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:11,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:11,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:11,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975486449] [2021-10-15 19:39:11,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:11,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:11,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:12,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:39:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:39:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-15 19:39:12,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:12,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977219867] [2021-10-15 19:39:12,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:12,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975486449] [2021-10-15 19:39:12,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975486449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:12,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:12,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:39:12,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692965938] [2021-10-15 19:39:12,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:39:12,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:39:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:39:12,328 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:12,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,329 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:12,329 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:12,329 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:12,418 INFO L129 PetriNetUnfolder]: 5/102 cut-off events. [2021-10-15 19:39:12,418 INFO L130 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2021-10-15 19:39:12,418 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 102 events. 5/102 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 263. Up to 45 conditions per place. [2021-10-15 19:39:12,419 INFO L132 encePairwiseOnDemand]: 51/58 looper letters, 42 selfloop transitions, 6 changer transitions 4/68 dead transitions. [2021-10-15 19:39:12,419 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 385 flow [2021-10-15 19:39:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:39:12,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:39:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2021-10-15 19:39:12,427 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.521551724137931 [2021-10-15 19:39:12,427 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 121 transitions. [2021-10-15 19:39:12,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 121 transitions. [2021-10-15 19:39:12,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:12,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 121 transitions. [2021-10-15 19:39:12,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,435 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,435 INFO L186 Difference]: Start difference. First operand has 56 places, 52 transitions, 219 flow. Second operand 4 states and 121 transitions. [2021-10-15 19:39:12,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 385 flow [2021-10-15 19:39:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 19:39:12,446 INFO L242 Difference]: Finished difference. Result has 58 places, 55 transitions, 268 flow [2021-10-15 19:39:12,447 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2021-10-15 19:39:12,447 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 18 predicate places. [2021-10-15 19:39:12,448 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 268 flow [2021-10-15 19:39:12,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,448 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:12,448 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:12,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:12,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 19:39:12,649 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1333477300, now seen corresponding path program 1 times [2021-10-15 19:39:12,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:12,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413561481] [2021-10-15 19:39:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:12,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:12,665 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634509704] [2021-10-15 19:39:12,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:12,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:12,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:12,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:12,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:39:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:12,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:39:12,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:12,994 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 19:39:12,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:12,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413561481] [2021-10-15 19:39:12,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:12,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634509704] [2021-10-15 19:39:12,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634509704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:39:12,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:39:12,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:39:12,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534890925] [2021-10-15 19:39:12,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:39:12,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:39:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:12,999 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:12,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 268 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:12,999 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:12,999 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:13,000 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:13,169 INFO L129 PetriNetUnfolder]: 5/96 cut-off events. [2021-10-15 19:39:13,169 INFO L130 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2021-10-15 19:39:13,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 96 events. 5/96 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 197 event pairs, 0 based on Foata normal form. 1/93 useless extension candidates. Maximal degree in co-relation 276. Up to 28 conditions per place. [2021-10-15 19:39:13,171 INFO L132 encePairwiseOnDemand]: 48/58 looper letters, 30 selfloop transitions, 17 changer transitions 1/58 dead transitions. [2021-10-15 19:39:13,171 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 382 flow [2021-10-15 19:39:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:39:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:39:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2021-10-15 19:39:13,173 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.34236453201970446 [2021-10-15 19:39:13,173 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 139 transitions. [2021-10-15 19:39:13,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 139 transitions. [2021-10-15 19:39:13,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:13,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 139 transitions. [2021-10-15 19:39:13,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:13,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 58.0) internal successors, (464), 8 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:13,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 58.0) internal successors, (464), 8 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:13,177 INFO L186 Difference]: Start difference. First operand has 58 places, 55 transitions, 268 flow. Second operand 7 states and 139 transitions. [2021-10-15 19:39:13,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 382 flow [2021-10-15 19:39:13,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 58 transitions, 372 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-10-15 19:39:13,182 INFO L242 Difference]: Finished difference. Result has 63 places, 54 transitions, 305 flow [2021-10-15 19:39:13,183 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2021-10-15 19:39:13,183 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 23 predicate places. [2021-10-15 19:39:13,183 INFO L470 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 305 flow [2021-10-15 19:39:13,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:13,184 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:13,184 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:13,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 19:39:13,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:13,398 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:13,398 INFO L82 PathProgramCache]: Analyzing trace with hash -89606074, now seen corresponding path program 1 times [2021-10-15 19:39:13,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:13,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109064917] [2021-10-15 19:39:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:13,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:13,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:13,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876926071] [2021-10-15 19:39:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:13,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:13,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:13,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:39:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:13,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 19:39:13,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:14,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:14,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109064917] [2021-10-15 19:39:14,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:14,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876926071] [2021-10-15 19:39:14,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876926071] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:14,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:14,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:14,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024924808] [2021-10-15 19:39:14,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:14,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:14,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:39:14,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,069 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:14,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:39:14,070 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:14,425 INFO L129 PetriNetUnfolder]: 7/124 cut-off events. [2021-10-15 19:39:14,425 INFO L130 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2021-10-15 19:39:14,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 420 conditions, 124 events. 7/124 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 334 event pairs, 0 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 406. Up to 62 conditions per place. [2021-10-15 19:39:14,427 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 68 selfloop transitions, 13 changer transitions 1/88 dead transitions. [2021-10-15 19:39:14,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 88 transitions, 643 flow [2021-10-15 19:39:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:39:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:39:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2021-10-15 19:39:14,429 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31417624521072796 [2021-10-15 19:39:14,429 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 164 transitions. [2021-10-15 19:39:14,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 164 transitions. [2021-10-15 19:39:14,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:14,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 164 transitions. [2021-10-15 19:39:14,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 18.22222222222222) internal successors, (164), 9 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,433 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,433 INFO L186 Difference]: Start difference. First operand has 63 places, 54 transitions, 305 flow. Second operand 9 states and 164 transitions. [2021-10-15 19:39:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 88 transitions, 643 flow [2021-10-15 19:39:14,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 610 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 19:39:14,440 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 413 flow [2021-10-15 19:39:14,440 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2021-10-15 19:39:14,440 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2021-10-15 19:39:14,440 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 413 flow [2021-10-15 19:39:14,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:14,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:14,441 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:14,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:14,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:14,666 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 19:39:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:14,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1021281049, now seen corresponding path program 1 times [2021-10-15 19:39:14,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:14,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400950805] [2021-10-15 19:39:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:14,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:14,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:14,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652087487] [2021-10-15 19:39:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:14,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:14,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:14,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:14,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:39:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 19:39:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:15,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:15,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400950805] [2021-10-15 19:39:15,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:15,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652087487] [2021-10-15 19:39:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652087487] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:15,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:15,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:39:15,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120726469] [2021-10-15 19:39:15,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:39:15,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:15,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:39:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:39:15,195 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:15,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:15,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:15,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:15,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:15,361 INFO L129 PetriNetUnfolder]: 9/165 cut-off events. [2021-10-15 19:39:15,362 INFO L130 PetriNetUnfolder]: For 297/297 co-relation queries the response was YES. [2021-10-15 19:39:15,364 INFO L84 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 165 events. 9/165 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 536 event pairs, 0 based on Foata normal form. 4/169 useless extension candidates. Maximal degree in co-relation 540. Up to 97 conditions per place. [2021-10-15 19:39:15,366 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 67 selfloop transitions, 13 changer transitions 5/95 dead transitions. [2021-10-15 19:39:15,367 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 95 transitions, 746 flow [2021-10-15 19:39:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:39:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:39:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2021-10-15 19:39:15,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4064039408866995 [2021-10-15 19:39:15,369 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 165 transitions. [2021-10-15 19:39:15,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 165 transitions. [2021-10-15 19:39:15,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:15,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 165 transitions. [2021-10-15 19:39:15,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:15,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 58.0) internal successors, (464), 8 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:15,373 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 58.0) internal successors, (464), 8 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:15,373 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 413 flow. Second operand 7 states and 165 transitions. [2021-10-15 19:39:15,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 95 transitions, 746 flow [2021-10-15 19:39:15,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 95 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-10-15 19:39:15,386 INFO L242 Difference]: Finished difference. Result has 76 places, 69 transitions, 503 flow [2021-10-15 19:39:15,387 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=503, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2021-10-15 19:39:15,387 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 36 predicate places. [2021-10-15 19:39:15,387 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 503 flow [2021-10-15 19:39:15,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:15,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:15,388 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:15,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-15 19:39:15,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 19:39:15,602 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:15,603 INFO L82 PathProgramCache]: Analyzing trace with hash 477321350, now seen corresponding path program 1 times [2021-10-15 19:39:15,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:15,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155054249] [2021-10-15 19:39:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:15,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:15,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:15,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128058110] [2021-10-15 19:39:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:15,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:15,621 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:15,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:39:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:16,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155054249] [2021-10-15 19:39:16,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:16,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128058110] [2021-10-15 19:39:16,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128058110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:16,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:16,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:39:16,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242448294] [2021-10-15 19:39:16,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:39:16,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:16,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:39:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:16,251 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:16,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 503 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:16,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:16,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:16,474 INFO L129 PetriNetUnfolder]: 10/181 cut-off events. [2021-10-15 19:39:16,474 INFO L130 PetriNetUnfolder]: For 455/455 co-relation queries the response was YES. [2021-10-15 19:39:16,478 INFO L84 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 181 events. 10/181 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 619 event pairs, 0 based on Foata normal form. 2/183 useless extension candidates. Maximal degree in co-relation 609. Up to 105 conditions per place. [2021-10-15 19:39:16,480 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 59 selfloop transitions, 13 changer transitions 12/99 dead transitions. [2021-10-15 19:39:16,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 823 flow [2021-10-15 19:39:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2021-10-15 19:39:16,483 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47629310344827586 [2021-10-15 19:39:16,483 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 221 transitions. [2021-10-15 19:39:16,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 221 transitions. [2021-10-15 19:39:16,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:16,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 221 transitions. [2021-10-15 19:39:16,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.625) internal successors, (221), 8 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,488 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,488 INFO L186 Difference]: Start difference. First operand has 76 places, 69 transitions, 503 flow. Second operand 8 states and 221 transitions. [2021-10-15 19:39:16,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 823 flow [2021-10-15 19:39:16,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 796 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:16,499 INFO L242 Difference]: Finished difference. Result has 85 places, 76 transitions, 607 flow [2021-10-15 19:39:16,500 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2021-10-15 19:39:16,501 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 45 predicate places. [2021-10-15 19:39:16,501 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 607 flow [2021-10-15 19:39:16,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:16,502 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:16,502 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:16,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:16,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:16,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:16,715 INFO L82 PathProgramCache]: Analyzing trace with hash 219215494, now seen corresponding path program 2 times [2021-10-15 19:39:16,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:16,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432112824] [2021-10-15 19:39:16,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:16,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:16,744 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:16,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606526210] [2021-10-15 19:39:16,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:16,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:16,751 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:16,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:39:17,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:17,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:17,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:39:17,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:17,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:17,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432112824] [2021-10-15 19:39:17,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:17,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606526210] [2021-10-15 19:39:17,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606526210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:17,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:17,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:39:17,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069495729] [2021-10-15 19:39:17,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:39:17,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:17,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:39:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:39:17,354 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:17,355 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 607 flow. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,355 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:17,355 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:17,356 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:17,608 INFO L129 PetriNetUnfolder]: 11/197 cut-off events. [2021-10-15 19:39:17,608 INFO L130 PetriNetUnfolder]: For 581/581 co-relation queries the response was YES. [2021-10-15 19:39:17,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 197 events. 11/197 cut-off events. For 581/581 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 717 event pairs, 0 based on Foata normal form. 2/199 useless extension candidates. Maximal degree in co-relation 683. Up to 121 conditions per place. [2021-10-15 19:39:17,611 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 71 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2021-10-15 19:39:17,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 101 transitions, 898 flow [2021-10-15 19:39:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2021-10-15 19:39:17,614 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4676724137931034 [2021-10-15 19:39:17,614 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 217 transitions. [2021-10-15 19:39:17,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 217 transitions. [2021-10-15 19:39:17,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:17,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 217 transitions. [2021-10-15 19:39:17,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 27.125) internal successors, (217), 8 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,619 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,619 INFO L186 Difference]: Start difference. First operand has 85 places, 76 transitions, 607 flow. Second operand 8 states and 217 transitions. [2021-10-15 19:39:17,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 101 transitions, 898 flow [2021-10-15 19:39:17,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 880 flow, removed 9 selfloop flow, removed 0 redundant places. [2021-10-15 19:39:17,639 INFO L242 Difference]: Finished difference. Result has 95 places, 84 transitions, 715 flow [2021-10-15 19:39:17,639 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=715, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2021-10-15 19:39:17,640 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 55 predicate places. [2021-10-15 19:39:17,640 INFO L470 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 715 flow [2021-10-15 19:39:17,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:17,640 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:17,641 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:17,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:17,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:39:17,866 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -855526903, now seen corresponding path program 1 times [2021-10-15 19:39:17,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:17,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340330009] [2021-10-15 19:39:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:17,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:17,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182866962] [2021-10-15 19:39:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:17,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:17,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:17,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:17,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:39:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:39:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:18,798 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 19:39:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:18,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340330009] [2021-10-15 19:39:18,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:18,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182866962] [2021-10-15 19:39:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182866962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:18,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:18,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:18,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830492408] [2021-10-15 19:39:18,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:18,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:18,802 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:18,803 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 715 flow. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:18,803 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:18,803 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:18,803 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:19,147 INFO L129 PetriNetUnfolder]: 12/221 cut-off events. [2021-10-15 19:39:19,147 INFO L130 PetriNetUnfolder]: For 641/641 co-relation queries the response was YES. [2021-10-15 19:39:19,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 221 events. 12/221 cut-off events. For 641/641 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 876 event pairs, 0 based on Foata normal form. 1/222 useless extension candidates. Maximal degree in co-relation 821. Up to 136 conditions per place. [2021-10-15 19:39:19,151 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 90 selfloop transitions, 16 changer transitions 7/123 dead transitions. [2021-10-15 19:39:19,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 123 transitions, 1126 flow [2021-10-15 19:39:19,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:19,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2021-10-15 19:39:19,154 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3879310344827586 [2021-10-15 19:39:19,155 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 225 transitions. [2021-10-15 19:39:19,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 225 transitions. [2021-10-15 19:39:19,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:19,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 225 transitions. [2021-10-15 19:39:19,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.5) internal successors, (225), 10 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,160 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,160 INFO L186 Difference]: Start difference. First operand has 95 places, 84 transitions, 715 flow. Second operand 10 states and 225 transitions. [2021-10-15 19:39:19,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 123 transitions, 1126 flow [2021-10-15 19:39:19,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 1097 flow, removed 11 selfloop flow, removed 2 redundant places. [2021-10-15 19:39:19,176 INFO L242 Difference]: Finished difference. Result has 105 places, 88 transitions, 790 flow [2021-10-15 19:39:19,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=790, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2021-10-15 19:39:19,177 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 65 predicate places. [2021-10-15 19:39:19,177 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 790 flow [2021-10-15 19:39:19,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:19,178 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:19,178 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:19,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:19,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:39:19,393 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:19,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:19,393 INFO L82 PathProgramCache]: Analyzing trace with hash 155590347, now seen corresponding path program 2 times [2021-10-15 19:39:19,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:19,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598858958] [2021-10-15 19:39:19,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:19,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:19,424 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:19,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973025965] [2021-10-15 19:39:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:19,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:19,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:19,434 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:19,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:39:19,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:19,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 19:39:19,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:20,599 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 19:39:20,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:20,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598858958] [2021-10-15 19:39:20,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:20,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973025965] [2021-10-15 19:39:20,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973025965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:20,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:20,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:39:20,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815388960] [2021-10-15 19:39:20,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:20,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:20,603 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:39:20,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 790 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:20,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:20,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:39:20,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:21,148 INFO L129 PetriNetUnfolder]: 14/253 cut-off events. [2021-10-15 19:39:21,149 INFO L130 PetriNetUnfolder]: For 795/795 co-relation queries the response was YES. [2021-10-15 19:39:21,150 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1009 conditions, 253 events. 14/253 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1139 event pairs, 0 based on Foata normal form. 1/254 useless extension candidates. Maximal degree in co-relation 975. Up to 168 conditions per place. [2021-10-15 19:39:21,153 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 101 selfloop transitions, 16 changer transitions 2/125 dead transitions. [2021-10-15 19:39:21,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 125 transitions, 1238 flow [2021-10-15 19:39:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2021-10-15 19:39:21,155 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.31896551724137934 [2021-10-15 19:39:21,156 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 185 transitions. [2021-10-15 19:39:21,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 185 transitions. [2021-10-15 19:39:21,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:21,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 185 transitions. [2021-10-15 19:39:21,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.5) internal successors, (185), 10 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,162 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,163 INFO L186 Difference]: Start difference. First operand has 105 places, 88 transitions, 790 flow. Second operand 10 states and 185 transitions. [2021-10-15 19:39:21,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 125 transitions, 1238 flow [2021-10-15 19:39:21,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 125 transitions, 1210 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-10-15 19:39:21,182 INFO L242 Difference]: Finished difference. Result has 111 places, 94 transitions, 895 flow [2021-10-15 19:39:21,182 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=895, PETRI_PLACES=111, PETRI_TRANSITIONS=94} [2021-10-15 19:39:21,183 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 71 predicate places. [2021-10-15 19:39:21,183 INFO L470 AbstractCegarLoop]: Abstraction has has 111 places, 94 transitions, 895 flow [2021-10-15 19:39:21,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:21,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:21,184 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:21,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:21,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:39:21,411 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:21,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:21,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1663177194, now seen corresponding path program 2 times [2021-10-15 19:39:21,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:21,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546694694] [2021-10-15 19:39:21,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:21,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:21,430 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:21,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511382566] [2021-10-15 19:39:21,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:21,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:21,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:21,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:21,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:39:21,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:21,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 19:39:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:22,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:22,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546694694] [2021-10-15 19:39:22,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:22,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511382566] [2021-10-15 19:39:22,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511382566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:22,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:22,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:39:22,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939384659] [2021-10-15 19:39:22,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:22,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:22,641 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:39:22,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 94 transitions, 895 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:22,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:22,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:39:22,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:23,023 INFO L129 PetriNetUnfolder]: 16/294 cut-off events. [2021-10-15 19:39:23,024 INFO L130 PetriNetUnfolder]: For 1002/1002 co-relation queries the response was YES. [2021-10-15 19:39:23,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1187 conditions, 294 events. 16/294 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1477 event pairs, 0 based on Foata normal form. 4/298 useless extension candidates. Maximal degree in co-relation 1151. Up to 200 conditions per place. [2021-10-15 19:39:23,028 INFO L132 encePairwiseOnDemand]: 46/58 looper letters, 101 selfloop transitions, 19 changer transitions 6/132 dead transitions. [2021-10-15 19:39:23,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 132 transitions, 1375 flow [2021-10-15 19:39:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:39:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:39:23,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2021-10-15 19:39:23,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3056426332288401 [2021-10-15 19:39:23,031 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 195 transitions. [2021-10-15 19:39:23,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 195 transitions. [2021-10-15 19:39:23,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:23,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 195 transitions. [2021-10-15 19:39:23,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,036 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,037 INFO L186 Difference]: Start difference. First operand has 111 places, 94 transitions, 895 flow. Second operand 11 states and 195 transitions. [2021-10-15 19:39:23,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 132 transitions, 1375 flow [2021-10-15 19:39:23,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 132 transitions, 1333 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:23,056 INFO L242 Difference]: Finished difference. Result has 118 places, 101 transitions, 999 flow [2021-10-15 19:39:23,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=999, PETRI_PLACES=118, PETRI_TRANSITIONS=101} [2021-10-15 19:39:23,057 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 78 predicate places. [2021-10-15 19:39:23,057 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 101 transitions, 999 flow [2021-10-15 19:39:23,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:23,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:23,058 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:23,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:23,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:39:23,278 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:23,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1610721748, now seen corresponding path program 1 times [2021-10-15 19:39:23,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:23,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974384420] [2021-10-15 19:39:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:23,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:23,289 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:23,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001867074] [2021-10-15 19:39:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:23,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:23,304 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:23,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:39:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 19:39:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:24,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:24,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974384420] [2021-10-15 19:39:24,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:24,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001867074] [2021-10-15 19:39:24,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001867074] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:24,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:39:24,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446638197] [2021-10-15 19:39:24,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:39:24,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:39:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:39:24,412 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:24,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 101 transitions, 999 flow. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,413 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:24,413 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:24,413 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:24,899 INFO L129 PetriNetUnfolder]: 17/313 cut-off events. [2021-10-15 19:39:24,900 INFO L130 PetriNetUnfolder]: For 1193/1193 co-relation queries the response was YES. [2021-10-15 19:39:24,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 313 events. 17/313 cut-off events. For 1193/1193 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1567 event pairs, 0 based on Foata normal form. 4/317 useless extension candidates. Maximal degree in co-relation 1275. Up to 221 conditions per place. [2021-10-15 19:39:24,906 INFO L132 encePairwiseOnDemand]: 48/58 looper letters, 105 selfloop transitions, 16 changer transitions 12/143 dead transitions. [2021-10-15 19:39:24,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 143 transitions, 1478 flow [2021-10-15 19:39:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 19:39:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 19:39:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2021-10-15 19:39:24,910 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3981191222570533 [2021-10-15 19:39:24,911 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 254 transitions. [2021-10-15 19:39:24,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 254 transitions. [2021-10-15 19:39:24,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:24,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 254 transitions. [2021-10-15 19:39:24,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 23.09090909090909) internal successors, (254), 11 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,916 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,916 INFO L186 Difference]: Start difference. First operand has 118 places, 101 transitions, 999 flow. Second operand 11 states and 254 transitions. [2021-10-15 19:39:24,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 143 transitions, 1478 flow [2021-10-15 19:39:24,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 143 transitions, 1439 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:24,945 INFO L242 Difference]: Finished difference. Result has 125 places, 104 transitions, 1067 flow [2021-10-15 19:39:24,946 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1067, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2021-10-15 19:39:24,946 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 85 predicate places. [2021-10-15 19:39:24,947 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 1067 flow [2021-10-15 19:39:24,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:24,947 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:24,947 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:24,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 19:39:25,154 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 690398539, now seen corresponding path program 3 times [2021-10-15 19:39:25,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:25,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890021308] [2021-10-15 19:39:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:25,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:25,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:25,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552031194] [2021-10-15 19:39:25,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:25,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:25,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:25,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:39:25,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:39:25,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:39:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-15 19:39:26,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:26,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890021308] [2021-10-15 19:39:26,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:26,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552031194] [2021-10-15 19:39:26,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552031194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:26,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:26,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:26,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9147118] [2021-10-15 19:39:26,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:26,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:26,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:26,040 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:26,041 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 1067 flow. Second operand has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,041 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:26,041 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:26,041 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:26,302 INFO L129 PetriNetUnfolder]: 19/345 cut-off events. [2021-10-15 19:39:26,302 INFO L130 PetriNetUnfolder]: For 1716/1716 co-relation queries the response was YES. [2021-10-15 19:39:26,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 345 events. 19/345 cut-off events. For 1716/1716 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1737 event pairs, 0 based on Foata normal form. 4/349 useless extension candidates. Maximal degree in co-relation 1412. Up to 192 conditions per place. [2021-10-15 19:39:26,307 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 88 selfloop transitions, 28 changer transitions 0/131 dead transitions. [2021-10-15 19:39:26,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 131 transitions, 1514 flow [2021-10-15 19:39:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:39:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:39:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2021-10-15 19:39:26,310 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2021-10-15 19:39:26,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 170 transitions. [2021-10-15 19:39:26,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 170 transitions. [2021-10-15 19:39:26,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:26,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 170 transitions. [2021-10-15 19:39:26,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,316 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 58.0) internal successors, (406), 7 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,317 INFO L186 Difference]: Start difference. First operand has 125 places, 104 transitions, 1067 flow. Second operand 6 states and 170 transitions. [2021-10-15 19:39:26,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 131 transitions, 1514 flow [2021-10-15 19:39:26,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 131 transitions, 1452 flow, removed 25 selfloop flow, removed 4 redundant places. [2021-10-15 19:39:26,345 INFO L242 Difference]: Finished difference. Result has 127 places, 111 transitions, 1193 flow [2021-10-15 19:39:26,346 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1193, PETRI_PLACES=127, PETRI_TRANSITIONS=111} [2021-10-15 19:39:26,346 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 87 predicate places. [2021-10-15 19:39:26,346 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 111 transitions, 1193 flow [2021-10-15 19:39:26,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:26,347 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:26,347 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:26,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:26,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:26,562 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash 948563977, now seen corresponding path program 4 times [2021-10-15 19:39:26,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:26,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208454318] [2021-10-15 19:39:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:26,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:26,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:26,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222600441] [2021-10-15 19:39:26,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:39:26,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:26,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:26,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:26,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:39:26,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:39:26,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:27,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:27,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208454318] [2021-10-15 19:39:27,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:27,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222600441] [2021-10-15 19:39:27,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222600441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:27,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:27,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:27,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891842540] [2021-10-15 19:39:27,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:27,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:27,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:27,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 111 transitions, 1193 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:27,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:27,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:27,467 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:27,947 INFO L129 PetriNetUnfolder]: 20/365 cut-off events. [2021-10-15 19:39:27,948 INFO L130 PetriNetUnfolder]: For 2060/2060 co-relation queries the response was YES. [2021-10-15 19:39:27,950 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1568 conditions, 365 events. 20/365 cut-off events. For 2060/2060 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1869 event pairs, 0 based on Foata normal form. 2/367 useless extension candidates. Maximal degree in co-relation 1523. Up to 247 conditions per place. [2021-10-15 19:39:27,953 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 104 selfloop transitions, 19 changer transitions 0/138 dead transitions. [2021-10-15 19:39:27,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 138 transitions, 1596 flow [2021-10-15 19:39:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2021-10-15 19:39:27,956 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2021-10-15 19:39:27,956 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 265 transitions. [2021-10-15 19:39:27,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 265 transitions. [2021-10-15 19:39:27,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:27,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 265 transitions. [2021-10-15 19:39:27,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.5) internal successors, (265), 10 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,960 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:27,961 INFO L186 Difference]: Start difference. First operand has 127 places, 111 transitions, 1193 flow. Second operand 10 states and 265 transitions. [2021-10-15 19:39:27,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 138 transitions, 1596 flow [2021-10-15 19:39:27,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 138 transitions, 1546 flow, removed 11 selfloop flow, removed 3 redundant places. [2021-10-15 19:39:27,990 INFO L242 Difference]: Finished difference. Result has 135 places, 117 transitions, 1278 flow [2021-10-15 19:39:27,990 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1278, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2021-10-15 19:39:27,991 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 95 predicate places. [2021-10-15 19:39:27,991 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 1278 flow [2021-10-15 19:39:27,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:27,992 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:27,992 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:28,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:28,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:39:28,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash 130855945, now seen corresponding path program 5 times [2021-10-15 19:39:28,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:28,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349132736] [2021-10-15 19:39:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:28,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:28,225 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:28,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409823481] [2021-10-15 19:39:28,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:39:28,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:28,227 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:28,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:39:28,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-15 19:39:28,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 19:39:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-15 19:39:29,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349132736] [2021-10-15 19:39:29,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:29,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409823481] [2021-10-15 19:39:29,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409823481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:29,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:29,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:29,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176908085] [2021-10-15 19:39:29,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:29,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:29,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:29,404 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:29,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 1278 flow. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:29,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:29,405 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:29,685 INFO L129 PetriNetUnfolder]: 22/406 cut-off events. [2021-10-15 19:39:29,685 INFO L130 PetriNetUnfolder]: For 2393/2393 co-relation queries the response was YES. [2021-10-15 19:39:29,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 406 events. 22/406 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2246 event pairs, 0 based on Foata normal form. 4/410 useless extension candidates. Maximal degree in co-relation 1714. Up to 223 conditions per place. [2021-10-15 19:39:29,691 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 107 selfloop transitions, 31 changer transitions 3/156 dead transitions. [2021-10-15 19:39:29,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 156 transitions, 1832 flow [2021-10-15 19:39:29,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:39:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:39:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2021-10-15 19:39:29,694 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4892241379310345 [2021-10-15 19:39:29,694 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 227 transitions. [2021-10-15 19:39:29,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 227 transitions. [2021-10-15 19:39:29,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:29,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 227 transitions. [2021-10-15 19:39:29,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 28.375) internal successors, (227), 8 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,698 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 58.0) internal successors, (522), 9 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,698 INFO L186 Difference]: Start difference. First operand has 135 places, 117 transitions, 1278 flow. Second operand 8 states and 227 transitions. [2021-10-15 19:39:29,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 156 transitions, 1832 flow [2021-10-15 19:39:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 156 transitions, 1769 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:29,732 INFO L242 Difference]: Finished difference. Result has 137 places, 125 transitions, 1418 flow [2021-10-15 19:39:29,733 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1418, PETRI_PLACES=137, PETRI_TRANSITIONS=125} [2021-10-15 19:39:29,733 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 97 predicate places. [2021-10-15 19:39:29,733 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 125 transitions, 1418 flow [2021-10-15 19:39:29,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:29,734 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:29,734 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:29,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-15 19:39:29,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:39:29,942 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash 948504395, now seen corresponding path program 6 times [2021-10-15 19:39:29,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:29,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399191645] [2021-10-15 19:39:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:29,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:29,972 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:29,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413047461] [2021-10-15 19:39:29,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:39:29,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:29,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:29,978 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:29,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:39:30,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-15 19:39:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:30,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:31,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:31,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399191645] [2021-10-15 19:39:31,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:31,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413047461] [2021-10-15 19:39:31,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413047461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:31,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:31,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:31,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870850256] [2021-10-15 19:39:31,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:31,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:31,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:31,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:31,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:31,024 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 125 transitions, 1418 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:31,024 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:31,024 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:31,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:31,479 INFO L129 PetriNetUnfolder]: 23/424 cut-off events. [2021-10-15 19:39:31,479 INFO L130 PetriNetUnfolder]: For 2836/2836 co-relation queries the response was YES. [2021-10-15 19:39:31,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 424 events. 23/424 cut-off events. For 2836/2836 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2413 event pairs, 0 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 1856. Up to 297 conditions per place. [2021-10-15 19:39:31,486 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 112 selfloop transitions, 17 changer transitions 6/150 dead transitions. [2021-10-15 19:39:31,486 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 150 transitions, 1826 flow [2021-10-15 19:39:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:31,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 263 transitions. [2021-10-15 19:39:31,489 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.453448275862069 [2021-10-15 19:39:31,490 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 263 transitions. [2021-10-15 19:39:31,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 263 transitions. [2021-10-15 19:39:31,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:31,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 263 transitions. [2021-10-15 19:39:31,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.3) internal successors, (263), 10 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,494 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:31,494 INFO L186 Difference]: Start difference. First operand has 137 places, 125 transitions, 1418 flow. Second operand 10 states and 263 transitions. [2021-10-15 19:39:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 150 transitions, 1826 flow [2021-10-15 19:39:31,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 150 transitions, 1731 flow, removed 22 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:31,532 INFO L242 Difference]: Finished difference. Result has 142 places, 129 transitions, 1422 flow [2021-10-15 19:39:31,533 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1422, PETRI_PLACES=142, PETRI_TRANSITIONS=129} [2021-10-15 19:39:31,533 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 102 predicate places. [2021-10-15 19:39:31,533 INFO L470 AbstractCegarLoop]: Abstraction has has 142 places, 129 transitions, 1422 flow [2021-10-15 19:39:31,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:31,534 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:31,534 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:31,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:31,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:31,762 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:31,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:31,762 INFO L82 PathProgramCache]: Analyzing trace with hash -127249911, now seen corresponding path program 7 times [2021-10-15 19:39:31,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:31,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050064695] [2021-10-15 19:39:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:31,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:31,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:31,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132412869] [2021-10-15 19:39:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:39:31,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:31,779 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:31,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:39:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:39:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:33,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:33,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050064695] [2021-10-15 19:39:33,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:33,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132412869] [2021-10-15 19:39:33,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132412869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:33,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:33,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:33,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922791810] [2021-10-15 19:39:33,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:33,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:33,046 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:33,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 129 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:33,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:33,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:33,048 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:33,652 INFO L129 PetriNetUnfolder]: 24/442 cut-off events. [2021-10-15 19:39:33,652 INFO L130 PetriNetUnfolder]: For 2845/2845 co-relation queries the response was YES. [2021-10-15 19:39:33,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1958 conditions, 442 events. 24/442 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2574 event pairs, 0 based on Foata normal form. 2/444 useless extension candidates. Maximal degree in co-relation 1908. Up to 305 conditions per place. [2021-10-15 19:39:33,659 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 121 selfloop transitions, 19 changer transitions 4/159 dead transitions. [2021-10-15 19:39:33,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 159 transitions, 1878 flow [2021-10-15 19:39:33,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2021-10-15 19:39:33,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.46379310344827585 [2021-10-15 19:39:33,662 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 269 transitions. [2021-10-15 19:39:33,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 269 transitions. [2021-10-15 19:39:33,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:33,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 269 transitions. [2021-10-15 19:39:33,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.9) internal successors, (269), 10 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,666 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:33,666 INFO L186 Difference]: Start difference. First operand has 142 places, 129 transitions, 1422 flow. Second operand 10 states and 269 transitions. [2021-10-15 19:39:33,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 159 transitions, 1878 flow [2021-10-15 19:39:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 159 transitions, 1832 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:33,707 INFO L242 Difference]: Finished difference. Result has 147 places, 135 transitions, 1518 flow [2021-10-15 19:39:33,707 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1518, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2021-10-15 19:39:33,708 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 107 predicate places. [2021-10-15 19:39:33,708 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1518 flow [2021-10-15 19:39:33,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:33,709 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:33,709 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:33,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:33,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:33,934 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:33,934 INFO L82 PathProgramCache]: Analyzing trace with hash -127309493, now seen corresponding path program 8 times [2021-10-15 19:39:33,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:33,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739264194] [2021-10-15 19:39:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:33,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:33,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:33,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8198771] [2021-10-15 19:39:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:33,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:33,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:33,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:33,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:39:34,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:35,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:35,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739264194] [2021-10-15 19:39:35,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:35,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8198771] [2021-10-15 19:39:35,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8198771] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:35,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:35,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:35,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341650282] [2021-10-15 19:39:35,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:35,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:35,129 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:39:35,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1518 flow. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:35,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:35,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:39:35,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:35,541 INFO L129 PetriNetUnfolder]: 25/460 cut-off events. [2021-10-15 19:39:35,542 INFO L130 PetriNetUnfolder]: For 3164/3164 co-relation queries the response was YES. [2021-10-15 19:39:35,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2066 conditions, 460 events. 25/460 cut-off events. For 3164/3164 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2740 event pairs, 0 based on Foata normal form. 2/462 useless extension candidates. Maximal degree in co-relation 2014. Up to 322 conditions per place. [2021-10-15 19:39:35,549 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 121 selfloop transitions, 17 changer transitions 10/163 dead transitions. [2021-10-15 19:39:35,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 163 transitions, 1971 flow [2021-10-15 19:39:35,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:39:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:39:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 267 transitions. [2021-10-15 19:39:35,553 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4603448275862069 [2021-10-15 19:39:35,553 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 267 transitions. [2021-10-15 19:39:35,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 267 transitions. [2021-10-15 19:39:35,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:35,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 267 transitions. [2021-10-15 19:39:35,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 26.7) internal successors, (267), 10 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,573 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:35,573 INFO L186 Difference]: Start difference. First operand has 147 places, 135 transitions, 1518 flow. Second operand 10 states and 267 transitions. [2021-10-15 19:39:35,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 163 transitions, 1971 flow [2021-10-15 19:39:35,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 163 transitions, 1900 flow, removed 22 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:35,619 INFO L242 Difference]: Finished difference. Result has 151 places, 139 transitions, 1555 flow [2021-10-15 19:39:35,620 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1555, PETRI_PLACES=151, PETRI_TRANSITIONS=139} [2021-10-15 19:39:35,620 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2021-10-15 19:39:35,620 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 139 transitions, 1555 flow [2021-10-15 19:39:35,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 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 19:39:35,621 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:35,621 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:35,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:35,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:35,846 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1198667980, now seen corresponding path program 2 times [2021-10-15 19:39:35,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:35,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384297109] [2021-10-15 19:39:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:35,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:35,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:35,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368877953] [2021-10-15 19:39:35,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:39:35,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:35,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:35,862 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:39:36,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:39:36,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:36,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-15 19:39:36,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:39:37,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:37,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384297109] [2021-10-15 19:39:37,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:37,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368877953] [2021-10-15 19:39:37,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368877953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:37,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:37,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:39:37,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763159522] [2021-10-15 19:39:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:39:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:39:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:39:37,415 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:37,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 139 transitions, 1555 flow. Second operand has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 9 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:37,415 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:37,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:37,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:39,435 INFO L129 PetriNetUnfolder]: 26/482 cut-off events. [2021-10-15 19:39:39,435 INFO L130 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2021-10-15 19:39:39,438 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 482 events. 26/482 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2946 event pairs, 0 based on Foata normal form. 1/483 useless extension candidates. Maximal degree in co-relation 2200. Up to 359 conditions per place. [2021-10-15 19:39:39,441 INFO L132 encePairwiseOnDemand]: 49/58 looper letters, 150 selfloop transitions, 20 changer transitions 11/191 dead transitions. [2021-10-15 19:39:39,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 191 transitions, 2286 flow [2021-10-15 19:39:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 19:39:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 19:39:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2021-10-15 19:39:39,443 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3740053050397878 [2021-10-15 19:39:39,443 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 282 transitions. [2021-10-15 19:39:39,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 282 transitions. [2021-10-15 19:39:39,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:39,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 282 transitions. [2021-10-15 19:39:39,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 21.692307692307693) internal successors, (282), 13 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,448 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 58.0) internal successors, (812), 14 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,448 INFO L186 Difference]: Start difference. First operand has 151 places, 139 transitions, 1555 flow. Second operand 13 states and 282 transitions. [2021-10-15 19:39:39,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 191 transitions, 2286 flow [2021-10-15 19:39:39,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 191 transitions, 2223 flow, removed 18 selfloop flow, removed 7 redundant places. [2021-10-15 19:39:39,495 INFO L242 Difference]: Finished difference. Result has 161 places, 149 transitions, 1713 flow [2021-10-15 19:39:39,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1713, PETRI_PLACES=161, PETRI_TRANSITIONS=149} [2021-10-15 19:39:39,496 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2021-10-15 19:39:39,497 INFO L470 AbstractCegarLoop]: Abstraction has has 161 places, 149 transitions, 1713 flow [2021-10-15 19:39:39,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 9 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:39,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:39,498 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:39,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:39,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:39,714 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2085182066, now seen corresponding path program 3 times [2021-10-15 19:39:39,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:39,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885405211] [2021-10-15 19:39:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:39,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:39,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:39,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510383913] [2021-10-15 19:39:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:39,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:39,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:39,734 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:39,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:39:40,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 19:39:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:39:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:39:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-15 19:39:40,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:39:40,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885405211] [2021-10-15 19:39:40,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:39:40,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510383913] [2021-10-15 19:39:40,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510383913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:39:40,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:39:40,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:39:40,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695739829] [2021-10-15 19:39:40,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:39:40,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:39:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:39:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:39:40,639 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2021-10-15 19:39:40,640 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 149 transitions, 1713 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:40,640 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:39:40,640 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2021-10-15 19:39:40,640 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:39:41,915 INFO L129 PetriNetUnfolder]: 26/416 cut-off events. [2021-10-15 19:39:41,915 INFO L130 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2021-10-15 19:39:41,919 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2089 conditions, 416 events. 26/416 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2348 event pairs, 0 based on Foata normal form. 30/446 useless extension candidates. Maximal degree in co-relation 2030. Up to 213 conditions per place. [2021-10-15 19:39:41,922 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 73 selfloop transitions, 51 changer transitions 12/143 dead transitions. [2021-10-15 19:39:41,923 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 143 transitions, 1953 flow [2021-10-15 19:39:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:39:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:39:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2021-10-15 19:39:41,924 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3793103448275862 [2021-10-15 19:39:41,924 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2021-10-15 19:39:41,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2021-10-15 19:39:41,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:39:41,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2021-10-15 19:39:41,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,926 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,926 INFO L186 Difference]: Start difference. First operand has 161 places, 149 transitions, 1713 flow. Second operand 4 states and 88 transitions. [2021-10-15 19:39:41,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 143 transitions, 1953 flow [2021-10-15 19:39:41,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 143 transitions, 1838 flow, removed 32 selfloop flow, removed 6 redundant places. [2021-10-15 19:39:41,965 INFO L242 Difference]: Finished difference. Result has 151 places, 131 transitions, 1572 flow [2021-10-15 19:39:41,966 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1572, PETRI_PLACES=151, PETRI_TRANSITIONS=131} [2021-10-15 19:39:41,966 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2021-10-15 19:39:41,966 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 131 transitions, 1572 flow [2021-10-15 19:39:41,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:39:41,967 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:39:41,967 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:39:42,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:39:42,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:42,194 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:39:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:39:42,194 INFO L82 PathProgramCache]: Analyzing trace with hash -620900914, now seen corresponding path program 9 times [2021-10-15 19:39:42,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:39:42,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312137390] [2021-10-15 19:39:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:39:42,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:39:42,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:39:42,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067036975] [2021-10-15 19:39:42,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:39:42,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:39:42,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:39:42,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:39:42,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:39:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:39:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:39:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-15 19:39:44,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:40:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-15 19:40:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:40:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312137390] [2021-10-15 19:40:09,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:40:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067036975] [2021-10-15 19:40:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067036975] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:40:09,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:40:09,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-15 19:40:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642031669] [2021-10-15 19:40:09,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 19:40:09,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:40:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 19:40:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=302, Unknown=4, NotChecked=0, Total=380 [2021-10-15 19:40:09,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 58 [2021-10-15 19:40:09,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 131 transitions, 1572 flow. Second operand has 20 states, 20 states have (on average 12.6) internal successors, (252), 20 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:40:09,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:40:09,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 58 [2021-10-15 19:40:09,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:40:31,738 WARN L207 SmtUtils]: Spent 20.63 s on a formula simplification. DAG size of input: 111 DAG size of output: 95 [2021-10-15 19:41:10,340 WARN L207 SmtUtils]: Spent 35.79 s on a formula simplification. DAG size of input: 136 DAG size of output: 103 [2021-10-15 19:42:21,587 WARN L207 SmtUtils]: Spent 26.05 s on a formula simplification. DAG size of input: 138 DAG size of output: 105 [2021-10-15 19:44:03,227 WARN L207 SmtUtils]: Spent 12.60 s on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-10-15 19:44:26,877 WARN L207 SmtUtils]: Spent 5.54 s on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2021-10-15 19:44:55,383 WARN L207 SmtUtils]: Spent 9.89 s on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2021-10-15 19:45:25,073 INFO L129 PetriNetUnfolder]: 27/389 cut-off events. [2021-10-15 19:45:25,073 INFO L130 PetriNetUnfolder]: For 3210/3210 co-relation queries the response was YES. [2021-10-15 19:45:25,076 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 389 events. 27/389 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2095 event pairs, 0 based on Foata normal form. 6/395 useless extension candidates. Maximal degree in co-relation 1947. Up to 87 conditions per place. [2021-10-15 19:45:25,079 INFO L132 encePairwiseOnDemand]: 37/58 looper letters, 26 selfloop transitions, 118 changer transitions 7/154 dead transitions. [2021-10-15 19:45:25,079 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 154 transitions, 2082 flow [2021-10-15 19:45:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-15 19:45:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-15 19:45:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 354 transitions. [2021-10-15 19:45:25,082 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2260536398467433 [2021-10-15 19:45:25,083 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 354 transitions. [2021-10-15 19:45:25,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 354 transitions. [2021-10-15 19:45:25,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:25,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 354 transitions. [2021-10-15 19:45:25,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 13.11111111111111) internal successors, (354), 27 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:25,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 58.0) internal successors, (1624), 28 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:25,090 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 58.0) internal successors, (1624), 28 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:25,090 INFO L186 Difference]: Start difference. First operand has 151 places, 131 transitions, 1572 flow. Second operand 27 states and 354 transitions. [2021-10-15 19:45:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 154 transitions, 2082 flow [2021-10-15 19:45:25,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 154 transitions, 2016 flow, removed 5 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:25,138 INFO L242 Difference]: Finished difference. Result has 179 places, 143 transitions, 1954 flow [2021-10-15 19:45:25,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1510, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1954, PETRI_PLACES=179, PETRI_TRANSITIONS=143} [2021-10-15 19:45:25,139 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 139 predicate places. [2021-10-15 19:45:25,140 INFO L470 AbstractCegarLoop]: Abstraction has has 179 places, 143 transitions, 1954 flow [2021-10-15 19:45:25,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.6) internal successors, (252), 20 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:25,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:25,140 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:25,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-10-15 19:45:25,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:25,349 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:25,350 INFO L82 PathProgramCache]: Analyzing trace with hash -879006770, now seen corresponding path program 10 times [2021-10-15 19:45:25,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:25,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708739510] [2021-10-15 19:45:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:25,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:25,361 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:25,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662020575] [2021-10-15 19:45:25,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:25,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:25,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:25,363 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:25,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 19:45:26,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:26,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:26,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:26,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:26,720 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 19:45:26,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:26,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708739510] [2021-10-15 19:45:26,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:26,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662020575] [2021-10-15 19:45:26,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662020575] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:26,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:26,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:26,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361893373] [2021-10-15 19:45:26,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:26,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:26,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:26,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:26,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:26,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 143 transitions, 1954 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:26,723 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:26,723 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:26,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:27,284 INFO L129 PetriNetUnfolder]: 28/354 cut-off events. [2021-10-15 19:45:27,285 INFO L130 PetriNetUnfolder]: For 3858/3858 co-relation queries the response was YES. [2021-10-15 19:45:27,289 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 354 events. 28/354 cut-off events. For 3858/3858 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1755 event pairs, 0 based on Foata normal form. 1/355 useless extension candidates. Maximal degree in co-relation 2013. Up to 241 conditions per place. [2021-10-15 19:45:27,292 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 129 selfloop transitions, 21 changer transitions 4/168 dead transitions. [2021-10-15 19:45:27,292 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 2478 flow [2021-10-15 19:45:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2021-10-15 19:45:27,295 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2021-10-15 19:45:27,295 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 302 transitions. [2021-10-15 19:45:27,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 302 transitions. [2021-10-15 19:45:27,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:27,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 302 transitions. [2021-10-15 19:45:27,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:27,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:27,299 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:27,300 INFO L186 Difference]: Start difference. First operand has 179 places, 143 transitions, 1954 flow. Second operand 12 states and 302 transitions. [2021-10-15 19:45:27,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 2478 flow [2021-10-15 19:45:27,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 168 transitions, 2166 flow, removed 87 selfloop flow, removed 18 redundant places. [2021-10-15 19:45:27,363 INFO L242 Difference]: Finished difference. Result has 172 places, 147 transitions, 1800 flow [2021-10-15 19:45:27,363 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1800, PETRI_PLACES=172, PETRI_TRANSITIONS=147} [2021-10-15 19:45:27,364 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 132 predicate places. [2021-10-15 19:45:27,364 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 147 transitions, 1800 flow [2021-10-15 19:45:27,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:27,364 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:27,365 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:27,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:27,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:27,590 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -312665972, now seen corresponding path program 11 times [2021-10-15 19:45:27,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:27,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988360858] [2021-10-15 19:45:27,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:27,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:27,611 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:27,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055394826] [2021-10-15 19:45:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:45:27,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:27,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:27,614 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:27,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 19:45:29,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 19:45:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:29,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:29,819 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 19:45:29,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:29,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988360858] [2021-10-15 19:45:29,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:29,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055394826] [2021-10-15 19:45:29,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055394826] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:29,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:29,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:29,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108059220] [2021-10-15 19:45:29,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:29,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:29,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:29,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:29,822 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:29,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 147 transitions, 1800 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:29,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:29,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:29,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:30,430 INFO L129 PetriNetUnfolder]: 29/364 cut-off events. [2021-10-15 19:45:30,430 INFO L130 PetriNetUnfolder]: For 2804/2804 co-relation queries the response was YES. [2021-10-15 19:45:30,432 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1921 conditions, 364 events. 29/364 cut-off events. For 2804/2804 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1806 event pairs, 0 based on Foata normal form. 1/365 useless extension candidates. Maximal degree in co-relation 1860. Up to 249 conditions per place. [2021-10-15 19:45:30,434 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 132 selfloop transitions, 21 changer transitions 4/171 dead transitions. [2021-10-15 19:45:30,434 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 171 transitions, 2278 flow [2021-10-15 19:45:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2021-10-15 19:45:30,436 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2021-10-15 19:45:30,437 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 302 transitions. [2021-10-15 19:45:30,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 302 transitions. [2021-10-15 19:45:30,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:30,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 302 transitions. [2021-10-15 19:45:30,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:30,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:30,440 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:30,441 INFO L186 Difference]: Start difference. First operand has 172 places, 147 transitions, 1800 flow. Second operand 12 states and 302 transitions. [2021-10-15 19:45:30,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 171 transitions, 2278 flow [2021-10-15 19:45:30,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 171 transitions, 2199 flow, removed 22 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:30,489 INFO L242 Difference]: Finished difference. Result has 176 places, 151 transitions, 1836 flow [2021-10-15 19:45:30,490 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1836, PETRI_PLACES=176, PETRI_TRANSITIONS=151} [2021-10-15 19:45:30,490 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 136 predicate places. [2021-10-15 19:45:30,490 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 151 transitions, 1836 flow [2021-10-15 19:45:30,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:30,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:30,491 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:30,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:30,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 19:45:30,705 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:30,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:30,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1388539442, now seen corresponding path program 12 times [2021-10-15 19:45:30,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:30,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866328404] [2021-10-15 19:45:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:30,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:30,718 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:30,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132572559] [2021-10-15 19:45:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:45:30,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:30,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:30,721 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:30,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 19:45:31,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-15 19:45:31,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:31,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:31,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:32,343 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 19:45:32,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866328404] [2021-10-15 19:45:32,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132572559] [2021-10-15 19:45:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132572559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:32,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:32,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:32,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994204301] [2021-10-15 19:45:32,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:32,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:32,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:32,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:32,347 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:32,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 151 transitions, 1836 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:32,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:32,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:32,791 INFO L129 PetriNetUnfolder]: 30/379 cut-off events. [2021-10-15 19:45:32,792 INFO L130 PetriNetUnfolder]: For 2971/2971 co-relation queries the response was YES. [2021-10-15 19:45:32,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1997 conditions, 379 events. 30/379 cut-off events. For 2971/2971 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1852 event pairs, 0 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 1934. Up to 257 conditions per place. [2021-10-15 19:45:32,799 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 134 selfloop transitions, 21 changer transitions 9/178 dead transitions. [2021-10-15 19:45:32,799 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 178 transitions, 2329 flow [2021-10-15 19:45:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 308 transitions. [2021-10-15 19:45:32,801 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2021-10-15 19:45:32,801 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 308 transitions. [2021-10-15 19:45:32,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 308 transitions. [2021-10-15 19:45:32,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:32,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 308 transitions. [2021-10-15 19:45:32,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,805 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,805 INFO L186 Difference]: Start difference. First operand has 176 places, 151 transitions, 1836 flow. Second operand 12 states and 308 transitions. [2021-10-15 19:45:32,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 178 transitions, 2329 flow [2021-10-15 19:45:32,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 178 transitions, 2264 flow, removed 15 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:32,858 INFO L242 Difference]: Finished difference. Result has 180 places, 155 transitions, 1890 flow [2021-10-15 19:45:32,859 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1890, PETRI_PLACES=180, PETRI_TRANSITIONS=155} [2021-10-15 19:45:32,859 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 140 predicate places. [2021-10-15 19:45:32,860 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 155 transitions, 1890 flow [2021-10-15 19:45:32,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,860 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:32,860 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:32,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:33,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 19:45:33,086 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -570890992, now seen corresponding path program 13 times [2021-10-15 19:45:33,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:33,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623428415] [2021-10-15 19:45:33,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:33,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:33,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:33,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490834556] [2021-10-15 19:45:33,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:45:33,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:33,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:33,101 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:33,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 19:45:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:33,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:33,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:34,654 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 19:45:34,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623428415] [2021-10-15 19:45:34,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:34,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490834556] [2021-10-15 19:45:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490834556] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:34,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:34,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:34,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676504462] [2021-10-15 19:45:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:34,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:34,657 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:34,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 155 transitions, 1890 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:34,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:34,658 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:35,165 INFO L129 PetriNetUnfolder]: 31/393 cut-off events. [2021-10-15 19:45:35,165 INFO L130 PetriNetUnfolder]: For 3232/3232 co-relation queries the response was YES. [2021-10-15 19:45:35,169 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2085 conditions, 393 events. 31/393 cut-off events. For 3232/3232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1920 event pairs, 0 based on Foata normal form. 2/395 useless extension candidates. Maximal degree in co-relation 2020. Up to 265 conditions per place. [2021-10-15 19:45:35,173 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 140 selfloop transitions, 21 changer transitions 13/188 dead transitions. [2021-10-15 19:45:35,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 188 transitions, 2440 flow [2021-10-15 19:45:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 312 transitions. [2021-10-15 19:45:35,176 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2021-10-15 19:45:35,176 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 312 transitions. [2021-10-15 19:45:35,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 312 transitions. [2021-10-15 19:45:35,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:35,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 312 transitions. [2021-10-15 19:45:35,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 26.0) internal successors, (312), 12 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,180 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,180 INFO L186 Difference]: Start difference. First operand has 180 places, 155 transitions, 1890 flow. Second operand 12 states and 312 transitions. [2021-10-15 19:45:35,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 188 transitions, 2440 flow [2021-10-15 19:45:35,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 188 transitions, 2383 flow, removed 17 selfloop flow, removed 6 redundant places. [2021-10-15 19:45:35,237 INFO L242 Difference]: Finished difference. Result has 187 places, 159 transitions, 1960 flow [2021-10-15 19:45:35,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1960, PETRI_PLACES=187, PETRI_TRANSITIONS=159} [2021-10-15 19:45:35,237 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 147 predicate places. [2021-10-15 19:45:35,237 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 159 transitions, 1960 flow [2021-10-15 19:45:35,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,238 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:35,238 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:35,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:35,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 19:45:35,438 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1388479860, now seen corresponding path program 14 times [2021-10-15 19:45:35,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:35,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598615117] [2021-10-15 19:45:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:35,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:35,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:35,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052621194] [2021-10-15 19:45:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:35,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:35,461 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:35,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:45:36,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:36,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:37,115 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 19:45:37,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:37,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598615117] [2021-10-15 19:45:37,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:37,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052621194] [2021-10-15 19:45:37,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052621194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:37,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:37,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:37,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033518748] [2021-10-15 19:45:37,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:37,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:37,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:37,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:37,118 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:37,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 159 transitions, 1960 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:37,119 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:37,119 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:37,826 INFO L129 PetriNetUnfolder]: 32/401 cut-off events. [2021-10-15 19:45:37,826 INFO L130 PetriNetUnfolder]: For 3472/3472 co-relation queries the response was YES. [2021-10-15 19:45:37,830 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 401 events. 32/401 cut-off events. For 3472/3472 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1963 event pairs, 0 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 2079. Up to 280 conditions per place. [2021-10-15 19:45:37,833 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 142 selfloop transitions, 21 changer transitions 4/181 dead transitions. [2021-10-15 19:45:37,833 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 181 transitions, 2441 flow [2021-10-15 19:45:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2021-10-15 19:45:37,840 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4339080459770115 [2021-10-15 19:45:37,840 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 302 transitions. [2021-10-15 19:45:37,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 302 transitions. [2021-10-15 19:45:37,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:37,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 302 transitions. [2021-10-15 19:45:37,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,843 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,843 INFO L186 Difference]: Start difference. First operand has 187 places, 159 transitions, 1960 flow. Second operand 12 states and 302 transitions. [2021-10-15 19:45:37,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 181 transitions, 2441 flow [2021-10-15 19:45:37,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 181 transitions, 2366 flow, removed 20 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:37,902 INFO L242 Difference]: Finished difference. Result has 191 places, 163 transitions, 2001 flow [2021-10-15 19:45:37,902 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1885, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2001, PETRI_PLACES=191, PETRI_TRANSITIONS=163} [2021-10-15 19:45:37,906 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 151 predicate places. [2021-10-15 19:45:37,916 INFO L470 AbstractCegarLoop]: Abstraction has has 191 places, 163 transitions, 2001 flow [2021-10-15 19:45:37,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,917 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:37,917 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:38,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:38,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 19:45:38,130 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash 196807118, now seen corresponding path program 15 times [2021-10-15 19:45:38,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:38,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605305944] [2021-10-15 19:45:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:38,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:38,145 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:38,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651772858] [2021-10-15 19:45:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:38,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:38,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:38,147 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:38,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 19:45:39,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:45:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-15 19:45:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-15 19:45:39,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:39,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605305944] [2021-10-15 19:45:39,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:39,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651772858] [2021-10-15 19:45:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651772858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:39,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:39,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:39,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273038549] [2021-10-15 19:45:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:39,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:39,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:39,568 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:39,569 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 163 transitions, 2001 flow. Second operand has 8 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 19:45:39,569 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:39,569 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:39,569 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:40,327 INFO L129 PetriNetUnfolder]: 34/421 cut-off events. [2021-10-15 19:45:40,328 INFO L130 PetriNetUnfolder]: For 3918/3918 co-relation queries the response was YES. [2021-10-15 19:45:40,330 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 421 events. 34/421 cut-off events. For 3918/3918 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2106 event pairs, 0 based on Foata normal form. 2/423 useless extension candidates. Maximal degree in co-relation 2203. Up to 250 conditions per place. [2021-10-15 19:45:40,334 INFO L132 encePairwiseOnDemand]: 51/58 looper letters, 138 selfloop transitions, 33 changer transitions 0/185 dead transitions. [2021-10-15 19:45:40,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 185 transitions, 2588 flow [2021-10-15 19:45:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 19:45:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 19:45:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2021-10-15 19:45:40,336 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42528735632183906 [2021-10-15 19:45:40,337 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 222 transitions. [2021-10-15 19:45:40,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 222 transitions. [2021-10-15 19:45:40,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:40,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 222 transitions. [2021-10-15 19:45:40,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.666666666666668) internal successors, (222), 9 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,340 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 58.0) internal successors, (580), 10 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,340 INFO L186 Difference]: Start difference. First operand has 191 places, 163 transitions, 2001 flow. Second operand 9 states and 222 transitions. [2021-10-15 19:45:40,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 185 transitions, 2588 flow [2021-10-15 19:45:40,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 185 transitions, 2525 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:40,408 INFO L242 Difference]: Finished difference. Result has 193 places, 170 transitions, 2154 flow [2021-10-15 19:45:40,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2154, PETRI_PLACES=193, PETRI_TRANSITIONS=170} [2021-10-15 19:45:40,409 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 153 predicate places. [2021-10-15 19:45:40,409 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 170 transitions, 2154 flow [2021-10-15 19:45:40,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 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 19:45:40,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:40,410 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:40,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:40,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:40,634 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:40,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:40,634 INFO L82 PathProgramCache]: Analyzing trace with hash -879066352, now seen corresponding path program 16 times [2021-10-15 19:45:40,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:40,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290245470] [2021-10-15 19:45:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:40,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:40,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:40,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475258722] [2021-10-15 19:45:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:40,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:40,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:40,656 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:40,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 19:45:41,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:41,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:42,397 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 19:45:42,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:42,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290245470] [2021-10-15 19:45:42,398 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:42,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475258722] [2021-10-15 19:45:42,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475258722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:42,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:42,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:42,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986243832] [2021-10-15 19:45:42,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:42,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:42,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:42,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:42,400 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:42,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 170 transitions, 2154 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:42,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:42,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:43,079 INFO L129 PetriNetUnfolder]: 35/436 cut-off events. [2021-10-15 19:45:43,079 INFO L130 PetriNetUnfolder]: For 4293/4293 co-relation queries the response was YES. [2021-10-15 19:45:43,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 436 events. 35/436 cut-off events. For 4293/4293 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2204 event pairs, 0 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2341. Up to 304 conditions per place. [2021-10-15 19:45:43,085 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 156 selfloop transitions, 21 changer transitions 9/200 dead transitions. [2021-10-15 19:45:43,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 200 transitions, 2720 flow [2021-10-15 19:45:43,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 308 transitions. [2021-10-15 19:45:43,087 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4425287356321839 [2021-10-15 19:45:43,087 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 308 transitions. [2021-10-15 19:45:43,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 308 transitions. [2021-10-15 19:45:43,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:43,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 308 transitions. [2021-10-15 19:45:43,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,091 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,091 INFO L186 Difference]: Start difference. First operand has 193 places, 170 transitions, 2154 flow. Second operand 12 states and 308 transitions. [2021-10-15 19:45:43,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 200 transitions, 2720 flow [2021-10-15 19:45:43,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 200 transitions, 2638 flow, removed 18 selfloop flow, removed 5 redundant places. [2021-10-15 19:45:43,141 INFO L242 Difference]: Finished difference. Result has 201 places, 174 transitions, 2196 flow [2021-10-15 19:45:43,142 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2196, PETRI_PLACES=201, PETRI_TRANSITIONS=174} [2021-10-15 19:45:43,142 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 161 predicate places. [2021-10-15 19:45:43,142 INFO L470 AbstractCegarLoop]: Abstraction has has 201 places, 174 transitions, 2196 flow [2021-10-15 19:45:43,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:43,142 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:43,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:43,346 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash -620841332, now seen corresponding path program 17 times [2021-10-15 19:45:43,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:43,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597242187] [2021-10-15 19:45:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:43,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:43,363 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:43,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121148511] [2021-10-15 19:45:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:45:43,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:43,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:43,365 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:43,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 19:45:44,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-15 19:45:44,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:44,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:44,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:45,654 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 19:45:45,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597242187] [2021-10-15 19:45:45,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:45,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121148511] [2021-10-15 19:45:45,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121148511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:45,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:45,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:45,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078982085] [2021-10-15 19:45:45,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:45,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:45,658 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:45,659 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 174 transitions, 2196 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,659 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:45,659 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:45,659 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:46,091 INFO L129 PetriNetUnfolder]: 36/445 cut-off events. [2021-10-15 19:45:46,092 INFO L130 PetriNetUnfolder]: For 4468/4468 co-relation queries the response was YES. [2021-10-15 19:45:46,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2465 conditions, 445 events. 36/445 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2276 event pairs, 0 based on Foata normal form. 1/446 useless extension candidates. Maximal degree in co-relation 2391. Up to 320 conditions per place. [2021-10-15 19:45:46,101 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 160 selfloop transitions, 21 changer transitions 0/195 dead transitions. [2021-10-15 19:45:46,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 195 transitions, 2733 flow [2021-10-15 19:45:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 298 transitions. [2021-10-15 19:45:46,104 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4281609195402299 [2021-10-15 19:45:46,104 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 298 transitions. [2021-10-15 19:45:46,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 298 transitions. [2021-10-15 19:45:46,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:46,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 298 transitions. [2021-10-15 19:45:46,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,108 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,108 INFO L186 Difference]: Start difference. First operand has 201 places, 174 transitions, 2196 flow. Second operand 12 states and 298 transitions. [2021-10-15 19:45:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 195 transitions, 2733 flow [2021-10-15 19:45:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 195 transitions, 2660 flow, removed 19 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:46,187 INFO L242 Difference]: Finished difference. Result has 205 places, 178 transitions, 2252 flow [2021-10-15 19:45:46,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2252, PETRI_PLACES=205, PETRI_TRANSITIONS=178} [2021-10-15 19:45:46,188 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 165 predicate places. [2021-10-15 19:45:46,188 INFO L470 AbstractCegarLoop]: Abstraction has has 205 places, 178 transitions, 2252 flow [2021-10-15 19:45:46,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:46,189 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:46,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:46,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:46,401 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash -570831410, now seen corresponding path program 18 times [2021-10-15 19:45:46,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:46,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152647014] [2021-10-15 19:45:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:46,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:46,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:46,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360191199] [2021-10-15 19:45:46,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:45:46,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:46,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:46,433 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:46,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-15 19:45:47,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-15 19:45:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:47,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:48,334 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 19:45:48,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152647014] [2021-10-15 19:45:48,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:48,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360191199] [2021-10-15 19:45:48,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360191199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:48,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:48,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:48,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969883673] [2021-10-15 19:45:48,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:48,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:48,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:48,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:48,338 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:48,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 178 transitions, 2252 flow. Second operand has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:48,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:48,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:48,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:49,064 INFO L129 PetriNetUnfolder]: 37/455 cut-off events. [2021-10-15 19:45:49,064 INFO L130 PetriNetUnfolder]: For 4838/4838 co-relation queries the response was YES. [2021-10-15 19:45:49,070 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 455 events. 37/455 cut-off events. For 4838/4838 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2385 event pairs, 0 based on Foata normal form. 1/456 useless extension candidates. Maximal degree in co-relation 2469. Up to 320 conditions per place. [2021-10-15 19:45:49,074 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 163 selfloop transitions, 21 changer transitions 8/206 dead transitions. [2021-10-15 19:45:49,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 206 transitions, 2847 flow [2021-10-15 19:45:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 306 transitions. [2021-10-15 19:45:49,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4396551724137931 [2021-10-15 19:45:49,076 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 306 transitions. [2021-10-15 19:45:49,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 306 transitions. [2021-10-15 19:45:49,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:49,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 306 transitions. [2021-10-15 19:45:49,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 25.5) internal successors, (306), 12 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,080 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 58.0) internal successors, (754), 13 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,080 INFO L186 Difference]: Start difference. First operand has 205 places, 178 transitions, 2252 flow. Second operand 12 states and 306 transitions. [2021-10-15 19:45:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 206 transitions, 2847 flow [2021-10-15 19:45:49,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 206 transitions, 2768 flow, removed 22 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:49,169 INFO L242 Difference]: Finished difference. Result has 209 places, 182 transitions, 2313 flow [2021-10-15 19:45:49,170 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2313, PETRI_PLACES=209, PETRI_TRANSITIONS=182} [2021-10-15 19:45:49,171 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 169 predicate places. [2021-10-15 19:45:49,171 INFO L470 AbstractCegarLoop]: Abstraction has has 209 places, 182 transitions, 2313 flow [2021-10-15 19:45:49,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,172 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:49,172 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:49,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:49,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:49,398 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1607935341, now seen corresponding path program 19 times [2021-10-15 19:45:49,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:49,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212059666] [2021-10-15 19:45:49,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:49,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:49,444 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:49,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652628976] [2021-10-15 19:45:49,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:45:49,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:49,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:49,446 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:49,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-15 19:45:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:50,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:45:50,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:51,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:51,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212059666] [2021-10-15 19:45:51,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:51,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652628976] [2021-10-15 19:45:51,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652628976] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:51,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:51,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:45:51,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546312551] [2021-10-15 19:45:51,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:45:51,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:51,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:45:51,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:45:51,498 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:51,498 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 182 transitions, 2313 flow. Second operand has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,498 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:51,498 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:51,499 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:52,231 INFO L129 PetriNetUnfolder]: 38/470 cut-off events. [2021-10-15 19:45:52,231 INFO L130 PetriNetUnfolder]: For 5187/5187 co-relation queries the response was YES. [2021-10-15 19:45:52,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2628 conditions, 470 events. 38/470 cut-off events. For 5187/5187 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2412 event pairs, 0 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 2550. Up to 321 conditions per place. [2021-10-15 19:45:52,241 INFO L132 encePairwiseOnDemand]: 50/58 looper letters, 165 selfloop transitions, 25 changer transitions 13/217 dead transitions. [2021-10-15 19:45:52,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 217 transitions, 2948 flow [2021-10-15 19:45:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:45:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:45:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 360 transitions. [2021-10-15 19:45:52,244 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4433497536945813 [2021-10-15 19:45:52,244 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 360 transitions. [2021-10-15 19:45:52,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 360 transitions. [2021-10-15 19:45:52,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:52,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 360 transitions. [2021-10-15 19:45:52,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.714285714285715) internal successors, (360), 14 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:52,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:52,248 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:52,249 INFO L186 Difference]: Start difference. First operand has 209 places, 182 transitions, 2313 flow. Second operand 14 states and 360 transitions. [2021-10-15 19:45:52,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 217 transitions, 2948 flow [2021-10-15 19:45:52,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 217 transitions, 2855 flow, removed 29 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:52,339 INFO L242 Difference]: Finished difference. Result has 215 places, 186 transitions, 2363 flow [2021-10-15 19:45:52,340 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2363, PETRI_PLACES=215, PETRI_TRANSITIONS=186} [2021-10-15 19:45:52,340 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 175 predicate places. [2021-10-15 19:45:52,340 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 186 transitions, 2363 flow [2021-10-15 19:45:52,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:52,341 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:52,341 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:52,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:52,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-15 19:45:52,566 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1098402669, now seen corresponding path program 20 times [2021-10-15 19:45:52,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:52,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452291951] [2021-10-15 19:45:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:52,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:52,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:52,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769064413] [2021-10-15 19:45:52,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:52,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:52,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:52,601 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:52,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-15 19:45:53,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:53,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:45:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:54,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:54,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452291951] [2021-10-15 19:45:54,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:54,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769064413] [2021-10-15 19:45:54,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769064413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:54,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:54,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:45:54,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314892412] [2021-10-15 19:45:54,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:45:54,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:54,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:45:54,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:45:54,715 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:54,716 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 186 transitions, 2363 flow. Second operand has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:54,716 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:54,716 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:54,716 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:55,245 INFO L129 PetriNetUnfolder]: 39/479 cut-off events. [2021-10-15 19:45:55,245 INFO L130 PetriNetUnfolder]: For 5558/5558 co-relation queries the response was YES. [2021-10-15 19:45:55,249 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 479 events. 39/479 cut-off events. For 5558/5558 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2489 event pairs, 0 based on Foata normal form. 1/480 useless extension candidates. Maximal degree in co-relation 2626. Up to 329 conditions per place. [2021-10-15 19:45:55,253 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 171 selfloop transitions, 25 changer transitions 12/222 dead transitions. [2021-10-15 19:45:55,254 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 222 transitions, 3035 flow [2021-10-15 19:45:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:45:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:45:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 358 transitions. [2021-10-15 19:45:55,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4408866995073892 [2021-10-15 19:45:55,256 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 358 transitions. [2021-10-15 19:45:55,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 358 transitions. [2021-10-15 19:45:55,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:55,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 358 transitions. [2021-10-15 19:45:55,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,260 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 58.0) internal successors, (870), 15 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,260 INFO L186 Difference]: Start difference. First operand has 215 places, 186 transitions, 2363 flow. Second operand 14 states and 358 transitions. [2021-10-15 19:45:55,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 222 transitions, 3035 flow [2021-10-15 19:45:55,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 222 transitions, 2944 flow, removed 24 selfloop flow, removed 11 redundant places. [2021-10-15 19:45:55,334 INFO L242 Difference]: Finished difference. Result has 219 places, 190 transitions, 2428 flow [2021-10-15 19:45:55,335 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2428, PETRI_PLACES=219, PETRI_TRANSITIONS=190} [2021-10-15 19:45:55,335 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 179 predicate places. [2021-10-15 19:45:55,336 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 190 transitions, 2428 flow [2021-10-15 19:45:55,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 24.333333333333332) internal successors, (219), 9 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:55,336 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:55,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-15 19:45:55,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-15 19:45:55,550 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:45:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:55,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1607875759, now seen corresponding path program 21 times [2021-10-15 19:45:55,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:55,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892406736] [2021-10-15 19:45:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:55,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:55,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:55,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926340918] [2021-10-15 19:45:55,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:55,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:55,607 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:55,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-15 19:45:56,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 19:45:56,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-15 19:45:56,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-10-15 19:45:57,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:57,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892406736] [2021-10-15 19:45:57,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:57,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926340918] [2021-10-15 19:45:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926340918] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:57,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:57,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:45:57,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827745958] [2021-10-15 19:45:57,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:45:57,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:57,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:45:57,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:45:57,214 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2021-10-15 19:45:57,214 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 190 transitions, 2428 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:57,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2021-10-15 19:45:57,215 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:57,378 INFO L129 PetriNetUnfolder]: 39/453 cut-off events. [2021-10-15 19:45:57,378 INFO L130 PetriNetUnfolder]: For 5574/5574 co-relation queries the response was YES. [2021-10-15 19:45:57,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 453 events. 39/453 cut-off events. For 5574/5574 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2312 event pairs, 0 based on Foata normal form. 13/466 useless extension candidates. Maximal degree in co-relation 2414. Up to 282 conditions per place. [2021-10-15 19:45:57,383 INFO L132 encePairwiseOnDemand]: 52/58 looper letters, 0 selfloop transitions, 0 changer transitions 186/186 dead transitions. [2021-10-15 19:45:57,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 186 transitions, 2730 flow [2021-10-15 19:45:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:45:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:45:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2021-10-15 19:45:57,389 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41810344827586204 [2021-10-15 19:45:57,390 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 97 transitions. [2021-10-15 19:45:57,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 97 transitions. [2021-10-15 19:45:57,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:57,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 97 transitions. [2021-10-15 19:45:57,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 24.25) internal successors, (97), 4 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 19:45:57,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,391 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,391 INFO L186 Difference]: Start difference. First operand has 219 places, 190 transitions, 2428 flow. Second operand 4 states and 97 transitions. [2021-10-15 19:45:57,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 186 transitions, 2730 flow [2021-10-15 19:45:57,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 186 transitions, 2601 flow, removed 43 selfloop flow, removed 11 redundant places. [2021-10-15 19:45:57,481 INFO L242 Difference]: Finished difference. Result has 207 places, 0 transitions, 0 flow [2021-10-15 19:45:57,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=207, PETRI_TRANSITIONS=0} [2021-10-15 19:45:57,482 INFO L334 CegarLoopForPetriNet]: 40 programPoint places, 167 predicate places. [2021-10-15 19:45:57,482 INFO L470 AbstractCegarLoop]: Abstraction has has 207 places, 0 transitions, 0 flow [2021-10-15 19:45:57,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,485 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,486 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,486 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,487 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,487 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,488 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:45:57,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:57,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-15 19:45:57,695 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:45:57,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:45:57 BoogieIcfgContainer [2021-10-15 19:45:57,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:45:57,701 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:45:57,701 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:45:57,702 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:45:57,702 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:39:07" (3/4) ... [2021-10-15 19:45:57,706 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:45:57,728 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-15 19:45:57,728 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:45:57,729 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:45:57,729 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:45:57,773 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:45:57,774 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:45:57,781 INFO L168 Benchmark]: Toolchain (without parser) took 410955.74 ms. Allocated memory was 113.2 MB in the beginning and 377.5 MB in the end (delta: 264.2 MB). Free memory was 77.6 MB in the beginning and 213.2 MB in the end (delta: -135.6 MB). Peak memory consumption was 127.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,781 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory was 94.0 MB in the beginning and 94.0 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:45:57,782 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.38 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 89.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,782 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.96 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:45:57,785 INFO L168 Benchmark]: Boogie Preprocessor took 31.23 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,785 INFO L168 Benchmark]: RCFGBuilder took 469.65 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,786 INFO L168 Benchmark]: TraceAbstraction took 409982.26 ms. Allocated memory was 113.2 MB in the beginning and 377.5 MB in the end (delta: 264.2 MB). Free memory was 74.8 MB in the beginning and 217.1 MB in the end (delta: -142.4 MB). Peak memory consumption was 235.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,786 INFO L168 Benchmark]: Witness Printer took 73.05 ms. Allocated memory is still 377.5 MB. Free memory was 217.1 MB in the beginning and 213.2 MB in the end (delta: 4.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:45:57,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 113.2 MB. Free memory was 94.0 MB in the beginning and 94.0 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.38 ms. Allocated memory is still 113.2 MB. Free memory was 77.4 MB in the beginning and 89.8 MB in the end (delta: -12.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.96 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.23 ms. Allocated memory is still 113.2 MB. Free memory was 88.0 MB in the beginning and 86.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 469.65 ms. Allocated memory is still 113.2 MB. Free memory was 86.7 MB in the beginning and 75.5 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 409982.26 ms. Allocated memory was 113.2 MB in the beginning and 377.5 MB in the end (delta: 264.2 MB). Free memory was 74.8 MB in the beginning and 217.1 MB in the end (delta: -142.4 MB). Peak memory consumption was 235.3 MB. Max. memory is 16.1 GB. * Witness Printer took 73.05 ms. Allocated memory is still 377.5 MB. Free memory was 217.1 MB in the beginning and 213.2 MB in the end (delta: 4.0 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: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 13]: 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, 44 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 21.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 409876.4ms, OverallIterations: 36, TraceHistogramMax: 6, EmptinessCheckTime: 0.0ms, AutomataDifference: 333831.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 63.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 736 SDtfs, 1312 SDslu, 2012 SDs, 0 SdLazy, 5671 SolverSat, 408 SolverUnsat, 48 SolverUnknown, 0 SolverNotchecked, 118688.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1372 GetRequests, 1026 SyntacticMatches, 6 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 224581.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2428occurred in iteration=35, InterpolantAutomatonStates: 350, 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: 274.0ms SsaConstructionTime, 4129.8ms SatisfiabilityAnalysisTime, 43251.6ms InterpolantComputationTime, 1264 NumberOfCodeBlocks, 1175 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1228 ConstructedInterpolants, 9 QuantifiedInterpolants, 15205 SizeOfPredicates, 261 NumberOfNonLiveVariables, 4636 ConjunctsInSsa, 860 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 232/1190 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 19:45:57,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_97f810e6-928f-4f0a-bc63-9c885520aa5d/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...