./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/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_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/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_5d27248e-b412-48f5-86fc-2f62d61dedba/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 9aa4eed507109801754e8007929fb4ed79ffe649 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:45:28,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:45:28,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:45:28,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:45:28,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:45:28,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:45:28,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:45:28,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:45:28,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:45:28,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:45:28,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:45:28,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:45:28,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:45:28,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:45:28,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:45:28,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:45:28,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:45:28,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:45:28,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:45:28,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:45:28,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:45:28,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:45:28,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:45:28,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:45:28,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:45:28,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:45:28,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:45:28,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:45:28,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:45:28,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:45:28,288 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:45:28,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:45:28,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:45:28,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:45:28,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:45:28,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:45:28,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:45:28,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:45:28,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:45:28,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:45:28,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:45:28,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:45:28,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:45:28,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:45:28,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:45:28,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:45:28,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:45:28,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:45:28,366 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:45:28,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:45:28,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:45:28,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:45:28,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:45:28,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:45:28,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:45:28,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:45:28,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:45:28,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:45:28,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:45:28,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:45:28,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:45:28,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:45:28,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:45:28,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:45:28,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:45:28,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:45:28,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:45:28,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:45:28,373 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:45:28,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:45:28,374 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:45:28,374 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:45:28,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:45:28,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:45:28,375 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_5d27248e-b412-48f5-86fc-2f62d61dedba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa4eed507109801754e8007929fb4ed79ffe649 [2021-10-15 19:45:28,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:45:28,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:45:28,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:45:28,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:45:28,749 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:45:28,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-10-15 19:45:28,856 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/data/0d5690040/76820fe2345f45a9b56970060010895e/FLAGb76e12a94 [2021-10-15 19:45:29,420 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:45:29,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2021-10-15 19:45:29,437 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/data/0d5690040/76820fe2345f45a9b56970060010895e/FLAGb76e12a94 [2021-10-15 19:45:29,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/data/0d5690040/76820fe2345f45a9b56970060010895e [2021-10-15 19:45:29,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:45:29,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:45:29,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:45:29,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:45:29,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:45:29,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:45:29" (1/1) ... [2021-10-15 19:45:29,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f65447a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:29, skipping insertion in model container [2021-10-15 19:45:29,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:45:29" (1/1) ... [2021-10-15 19:45:29,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:45:29,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:45:30,000 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_5d27248e-b412-48f5-86fc-2f62d61dedba/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-10-15 19:45:30,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:45:30,032 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:45:30,047 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_5d27248e-b412-48f5-86fc-2f62d61dedba/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c[573,586] [2021-10-15 19:45:30,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:45:30,070 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:45:30,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30 WrapperNode [2021-10-15 19:45:30,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:45:30,072 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:45:30,072 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:45:30,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:45:30,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:45:30,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:45:30,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:45:30,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:45:30,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:45:30,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:45:30,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:45:30,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:45:30,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (1/1) ... [2021-10-15 19:45:30,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:45:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:30,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:45:30,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:45:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:45:30,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:45:30,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:45:30,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:45:30,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:45:30,470 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 19:45:30,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:45:30 BoogieIcfgContainer [2021-10-15 19:45:30,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:45:30,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:45:30,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:45:30,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:45:30,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:45:29" (1/3) ... [2021-10-15 19:45:30,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166a5e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:45:30, skipping insertion in model container [2021-10-15 19:45:30,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:45:30" (2/3) ... [2021-10-15 19:45:30,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166a5e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:45:30, skipping insertion in model container [2021-10-15 19:45:30,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:45:30" (3/3) ... [2021-10-15 19:45:30,493 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2021-10-15 19:45:30,500 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:45:30,501 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 19:45:30,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:45:30,592 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 19:45:30,608 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 19:45:30,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 28 transitions, 56 flow [2021-10-15 19:45:30,680 INFO L129 PetriNetUnfolder]: 8/28 cut-off events. [2021-10-15 19:45:30,681 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:45:30,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 28 events. 8/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:45:30,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 28 transitions, 56 flow [2021-10-15 19:45:30,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 23 transitions, 46 flow [2021-10-15 19:45:30,709 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2021-10-15 19:45:30,709 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:45:30,716 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:30,717 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:30,718 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2021-10-15 19:45:30,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:30,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293454973] [2021-10-15 19:45:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:30,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:31,004 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 19:45:31,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:31,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293454973] [2021-10-15 19:45:31,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293454973] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:31,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:45:31,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:45:31,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863024917] [2021-10-15 19:45:31,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:45:31,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:31,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:45:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:45:31,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-10-15 19:45:31,048 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 23 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,048 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:31,048 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-10-15 19:45:31,049 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:31,061 INFO L129 PetriNetUnfolder]: 3/19 cut-off events. [2021-10-15 19:45:31,061 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:45:31,063 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 19 events. 3/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 4/19 useless extension candidates. Maximal degree in co-relation 19. Up to 3 conditions per place. [2021-10-15 19:45:31,064 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 0 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2021-10-15 19:45:31,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 19 transitions, 38 flow [2021-10-15 19:45:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:45:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:45:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2021-10-15 19:45:31,079 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-10-15 19:45:31,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 50 transitions. [2021-10-15 19:45:31,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 50 transitions. [2021-10-15 19:45:31,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:31,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 50 transitions. [2021-10-15 19:45:31,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 19:45:31,093 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 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 19:45:31,095 INFO L186 Difference]: Start difference. First operand has 17 places, 23 transitions, 46 flow. Second operand 2 states and 50 transitions. [2021-10-15 19:45:31,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 19 transitions, 38 flow [2021-10-15 19:45:31,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 19 transitions, 38 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:45:31,101 INFO L242 Difference]: Finished difference. Result has 18 places, 19 transitions, 38 flow [2021-10-15 19:45:31,103 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=18, PETRI_TRANSITIONS=19} [2021-10-15 19:45:31,104 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-10-15 19:45:31,105 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 19 transitions, 38 flow [2021-10-15 19:45:31,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,105 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:31,106 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:31,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:45:31,106 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:31,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-15 19:45:31,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:31,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596038352] [2021-10-15 19:45:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:31,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:31,157 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:31,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874859831] [2021-10-15 19:45:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:31,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:31,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:31,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:45:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:45:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:31,643 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 19:45:31,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:31,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596038352] [2021-10-15 19:45:31,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:31,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874859831] [2021-10-15 19:45:31,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874859831] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:31,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:45:31,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:45:31,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073887034] [2021-10-15 19:45:31,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:45:31,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:31,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:45:31,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:45:31,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 19:45:31,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 19 transitions, 38 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:31,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 19:45:31,663 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:31,901 INFO L129 PetriNetUnfolder]: 6/35 cut-off events. [2021-10-15 19:45:31,906 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:45:31,906 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 35 events. 6/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 60. Up to 12 conditions per place. [2021-10-15 19:45:31,910 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 16 selfloop transitions, 9 changer transitions 0/30 dead transitions. [2021-10-15 19:45:31,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 110 flow [2021-10-15 19:45:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:45:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:45:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2021-10-15 19:45:31,921 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2021-10-15 19:45:31,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 82 transitions. [2021-10-15 19:45:31,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 82 transitions. [2021-10-15 19:45:31,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:31,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 82 transitions. [2021-10-15 19:45:31,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,939 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,939 INFO L186 Difference]: Start difference. First operand has 18 places, 19 transitions, 38 flow. Second operand 7 states and 82 transitions. [2021-10-15 19:45:31,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 110 flow [2021-10-15 19:45:31,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 30 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:45:31,944 INFO L242 Difference]: Finished difference. Result has 26 places, 25 transitions, 88 flow [2021-10-15 19:45:31,945 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=88, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2021-10-15 19:45:31,946 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 9 predicate places. [2021-10-15 19:45:31,946 INFO L470 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 88 flow [2021-10-15 19:45:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:31,948 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:31,948 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:31,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:32,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:32,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2021-10-15 19:45:32,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:32,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990010152] [2021-10-15 19:45:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:32,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:32,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:32,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962141620] [2021-10-15 19:45:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:32,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:32,193 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:32,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:45:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 19:45:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:32,333 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 19:45:32,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:32,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990010152] [2021-10-15 19:45:32,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:32,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962141620] [2021-10-15 19:45:32,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962141620] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:32,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:45:32,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:45:32,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647065976] [2021-10-15 19:45:32,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:45:32,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:45:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:45:32,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:32,349 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:32,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:32,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:32,387 INFO L129 PetriNetUnfolder]: 5/33 cut-off events. [2021-10-15 19:45:32,387 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-15 19:45:32,388 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 33 events. 5/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 63. Up to 8 conditions per place. [2021-10-15 19:45:32,389 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 5 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2021-10-15 19:45:32,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 106 flow [2021-10-15 19:45:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:45:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:45:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2021-10-15 19:45:32,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-10-15 19:45:32,394 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 80 transitions. [2021-10-15 19:45:32,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 80 transitions. [2021-10-15 19:45:32,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:32,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 80 transitions. [2021-10-15 19:45:32,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,398 INFO L186 Difference]: Start difference. First operand has 26 places, 25 transitions, 88 flow. Second operand 4 states and 80 transitions. [2021-10-15 19:45:32,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 106 flow [2021-10-15 19:45:32,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 103 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:32,401 INFO L242 Difference]: Finished difference. Result has 29 places, 26 transitions, 101 flow [2021-10-15 19:45:32,402 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2021-10-15 19:45:32,402 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 12 predicate places. [2021-10-15 19:45:32,402 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 101 flow [2021-10-15 19:45:32,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,402 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:32,402 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:32,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:32,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:32,603 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2021-10-15 19:45:32,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:32,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961958828] [2021-10-15 19:45:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:32,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:32,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:32,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018341655] [2021-10-15 19:45:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:32,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:32,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:32,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:45:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:45:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:32,870 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 19:45:32,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:32,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961958828] [2021-10-15 19:45:32,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:32,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018341655] [2021-10-15 19:45:32,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018341655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:45:32,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:45:32,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:45:32,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508599140] [2021-10-15 19:45:32,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:45:32,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:45:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:45:32,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2021-10-15 19:45:32,877 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:32,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:32,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2021-10-15 19:45:32,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:33,009 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-10-15 19:45:33,011 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:45:33,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 30 events. 4/30 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 3/29 useless extension candidates. Maximal degree in co-relation 80. Up to 11 conditions per place. [2021-10-15 19:45:33,018 INFO L132 encePairwiseOnDemand]: 22/28 looper letters, 11 selfloop transitions, 4 changer transitions 3/25 dead transitions. [2021-10-15 19:45:33,019 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 137 flow [2021-10-15 19:45:33,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:45:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:45:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2021-10-15 19:45:33,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2021-10-15 19:45:33,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 65 transitions. [2021-10-15 19:45:33,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 65 transitions. [2021-10-15 19:45:33,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:33,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 65 transitions. [2021-10-15 19:45:33,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 19:45:33,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 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 19:45:33,033 INFO L186 Difference]: Start difference. First operand has 29 places, 26 transitions, 101 flow. Second operand 5 states and 65 transitions. [2021-10-15 19:45:33,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 137 flow [2021-10-15 19:45:33,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:45:33,037 INFO L242 Difference]: Finished difference. Result has 30 places, 22 transitions, 94 flow [2021-10-15 19:45:33,037 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2021-10-15 19:45:33,037 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 13 predicate places. [2021-10-15 19:45:33,038 INFO L470 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 94 flow [2021-10-15 19:45:33,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,038 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:33,038 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:33,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:33,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:33,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -75353705, now seen corresponding path program 1 times [2021-10-15 19:45:33,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:33,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192975928] [2021-10-15 19:45:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:33,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:33,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:33,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707708953] [2021-10-15 19:45:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:33,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:33,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:33,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:45:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:33,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:45:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:33,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:33,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192975928] [2021-10-15 19:45:33,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:33,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707708953] [2021-10-15 19:45:33,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707708953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:33,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:33,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:45:33,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460538952] [2021-10-15 19:45:33,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:45:33,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:33,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:45:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:45:33,494 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:33,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:33,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:33,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:33,526 INFO L129 PetriNetUnfolder]: 3/24 cut-off events. [2021-10-15 19:45:33,526 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-10-15 19:45:33,527 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 24 events. 3/24 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 3 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2021-10-15 19:45:33,527 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2021-10-15 19:45:33,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 22 transitions, 109 flow [2021-10-15 19:45:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:45:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:45:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2021-10-15 19:45:33,530 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7023809523809523 [2021-10-15 19:45:33,530 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2021-10-15 19:45:33,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2021-10-15 19:45:33,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:33,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2021-10-15 19:45:33,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,533 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,534 INFO L186 Difference]: Start difference. First operand has 30 places, 22 transitions, 94 flow. Second operand 6 states and 118 transitions. [2021-10-15 19:45:33,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 22 transitions, 109 flow [2021-10-15 19:45:33,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 22 transitions, 94 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-10-15 19:45:33,537 INFO L242 Difference]: Finished difference. Result has 31 places, 22 transitions, 94 flow [2021-10-15 19:45:33,537 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2021-10-15 19:45:33,537 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 14 predicate places. [2021-10-15 19:45:33,538 INFO L470 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 94 flow [2021-10-15 19:45:33,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:33,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:33,538 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:33,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:33,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:33,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 75336429, now seen corresponding path program 1 times [2021-10-15 19:45:33,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:33,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880294868] [2021-10-15 19:45:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:33,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:33,780 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:33,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901854355] [2021-10-15 19:45:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:33,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:33,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:33,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:45:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:45:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:34,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:34,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880294868] [2021-10-15 19:45:34,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:34,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901854355] [2021-10-15 19:45:34,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901854355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:34,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:34,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:45:34,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047200197] [2021-10-15 19:45:34,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:45:34,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:45:34,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:45:34,007 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:34,008 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 94 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,008 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:34,008 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:34,008 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:34,059 INFO L129 PetriNetUnfolder]: 4/30 cut-off events. [2021-10-15 19:45:34,059 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:45:34,060 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 30 events. 4/30 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 4 event pairs, 0 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 72. Up to 7 conditions per place. [2021-10-15 19:45:34,060 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 7 changer transitions 0/24 dead transitions. [2021-10-15 19:45:34,061 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 24 transitions, 126 flow [2021-10-15 19:45:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:45:34,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:45:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2021-10-15 19:45:34,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2021-10-15 19:45:34,063 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 156 transitions. [2021-10-15 19:45:34,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 156 transitions. [2021-10-15 19:45:34,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:34,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 156 transitions. [2021-10-15 19:45:34,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 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 19:45:34,067 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 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 19:45:34,067 INFO L186 Difference]: Start difference. First operand has 31 places, 22 transitions, 94 flow. Second operand 8 states and 156 transitions. [2021-10-15 19:45:34,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 24 transitions, 126 flow [2021-10-15 19:45:34,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 24 transitions, 115 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 19:45:34,070 INFO L242 Difference]: Finished difference. Result has 36 places, 24 transitions, 117 flow [2021-10-15 19:45:34,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=24} [2021-10-15 19:45:34,071 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 19 predicate places. [2021-10-15 19:45:34,071 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 24 transitions, 117 flow [2021-10-15 19:45:34,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:34,072 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:34,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:34,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:34,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:34,289 INFO L82 PathProgramCache]: Analyzing trace with hash -764242089, now seen corresponding path program 2 times [2021-10-15 19:45:34,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:34,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459298453] [2021-10-15 19:45:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:34,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:34,306 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:34,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185281783] [2021-10-15 19:45:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:34,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:34,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:45:34,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:34,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:45:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:34,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459298453] [2021-10-15 19:45:34,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:34,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185281783] [2021-10-15 19:45:34,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185281783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:34,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:34,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:45:34,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806736353] [2021-10-15 19:45:34,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 19:45:34,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 19:45:34,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-15 19:45:34,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:34,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 24 transitions, 117 flow. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:34,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:34,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:34,645 INFO L129 PetriNetUnfolder]: 5/36 cut-off events. [2021-10-15 19:45:34,646 INFO L130 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2021-10-15 19:45:34,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 36 events. 5/36 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 5 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 93. Up to 9 conditions per place. [2021-10-15 19:45:34,647 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2021-10-15 19:45:34,648 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 26 transitions, 157 flow [2021-10-15 19:45:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 19:45:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 19:45:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2021-10-15 19:45:34,650 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6928571428571428 [2021-10-15 19:45:34,650 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 194 transitions. [2021-10-15 19:45:34,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 194 transitions. [2021-10-15 19:45:34,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:34,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 194 transitions. [2021-10-15 19:45:34,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.4) internal successors, (194), 10 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 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 19:45:34,656 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 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 19:45:34,656 INFO L186 Difference]: Start difference. First operand has 36 places, 24 transitions, 117 flow. Second operand 10 states and 194 transitions. [2021-10-15 19:45:34,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 26 transitions, 157 flow [2021-10-15 19:45:34,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 26 transitions, 141 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-10-15 19:45:34,664 INFO L242 Difference]: Finished difference. Result has 42 places, 26 transitions, 143 flow [2021-10-15 19:45:34,665 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=143, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2021-10-15 19:45:34,665 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 25 predicate places. [2021-10-15 19:45:34,665 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 143 flow [2021-10-15 19:45:34,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:34,666 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:34,666 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:34,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:34,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:34,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1532576467, now seen corresponding path program 3 times [2021-10-15 19:45:34,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:34,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883445394] [2021-10-15 19:45:34,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:34,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:34,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:34,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570370522] [2021-10-15 19:45:34,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:34,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:34,897 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:34,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:45:35,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-15 19:45:35,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:35,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:45:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:35,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:35,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883445394] [2021-10-15 19:45:35,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:35,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570370522] [2021-10-15 19:45:35,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570370522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:35,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:45:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051030591] [2021-10-15 19:45:35,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:45:35,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:45:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:45:35,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 28 [2021-10-15 19:45:35,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 26 transitions, 143 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:35,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 28 [2021-10-15 19:45:35,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:35,338 INFO L129 PetriNetUnfolder]: 9/88 cut-off events. [2021-10-15 19:45:35,338 INFO L130 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2021-10-15 19:45:35,340 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 88 events. 9/88 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 179 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 19 conditions per place. [2021-10-15 19:45:35,342 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 24 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2021-10-15 19:45:35,342 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 303 flow [2021-10-15 19:45:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:45:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:45:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2021-10-15 19:45:35,344 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2021-10-15 19:45:35,344 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 115 transitions. [2021-10-15 19:45:35,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 115 transitions. [2021-10-15 19:45:35,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:35,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 115 transitions. [2021-10-15 19:45:35,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,348 INFO L186 Difference]: Start difference. First operand has 42 places, 26 transitions, 143 flow. Second operand 6 states and 115 transitions. [2021-10-15 19:45:35,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 303 flow [2021-10-15 19:45:35,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 260 flow, removed 11 selfloop flow, removed 7 redundant places. [2021-10-15 19:45:35,356 INFO L242 Difference]: Finished difference. Result has 42 places, 30 transitions, 159 flow [2021-10-15 19:45:35,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2021-10-15 19:45:35,357 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 25 predicate places. [2021-10-15 19:45:35,357 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 159 flow [2021-10-15 19:45:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:35,358 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:35,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:35,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:35,573 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1852580243, now seen corresponding path program 4 times [2021-10-15 19:45:35,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:35,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783864540] [2021-10-15 19:45:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:35,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:35,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:35,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504078888] [2021-10-15 19:45:35,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:35,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:35,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:35,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:35,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 19:45:35,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:35,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:45:35,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:35,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:35,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783864540] [2021-10-15 19:45:35,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:35,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504078888] [2021-10-15 19:45:35,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504078888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:35,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:35,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 19:45:35,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395529874] [2021-10-15 19:45:35,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:45:35,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:45:35,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:45:35,900 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:35,900 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 159 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:35,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:35,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:35,979 INFO L129 PetriNetUnfolder]: 12/111 cut-off events. [2021-10-15 19:45:35,979 INFO L130 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2021-10-15 19:45:35,980 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 111 events. 12/111 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 245 event pairs, 0 based on Foata normal form. 4/111 useless extension candidates. Maximal degree in co-relation 330. Up to 26 conditions per place. [2021-10-15 19:45:35,981 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2021-10-15 19:45:35,981 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 32 transitions, 207 flow [2021-10-15 19:45:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 19:45:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 19:45:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2021-10-15 19:45:35,984 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2021-10-15 19:45:35,984 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 232 transitions. [2021-10-15 19:45:35,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 232 transitions. [2021-10-15 19:45:35,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:35,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 232 transitions. [2021-10-15 19:45:35,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,988 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,988 INFO L186 Difference]: Start difference. First operand has 42 places, 30 transitions, 159 flow. Second operand 12 states and 232 transitions. [2021-10-15 19:45:35,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 32 transitions, 207 flow [2021-10-15 19:45:35,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 32 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:45:35,993 INFO L242 Difference]: Finished difference. Result has 54 places, 32 transitions, 206 flow [2021-10-15 19:45:35,993 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=206, PETRI_PLACES=54, PETRI_TRANSITIONS=32} [2021-10-15 19:45:35,993 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 37 predicate places. [2021-10-15 19:45:35,993 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 32 transitions, 206 flow [2021-10-15 19:45:35,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:35,994 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:35,994 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:36,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:36,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:36,221 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 1 times [2021-10-15 19:45:36,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:36,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716844848] [2021-10-15 19:45:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:36,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:36,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:36,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001794625] [2021-10-15 19:45:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:36,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:36,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:36,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 19:45:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 19:45:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:36,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:36,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716844848] [2021-10-15 19:45:36,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:36,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001794625] [2021-10-15 19:45:36,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001794625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:36,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:36,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 19:45:36,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303296156] [2021-10-15 19:45:36,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 19:45:36,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:36,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 19:45:36,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-15 19:45:36,628 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:36,628 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 32 transitions, 206 flow. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:36,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:36,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:36,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:36,737 INFO L129 PetriNetUnfolder]: 15/134 cut-off events. [2021-10-15 19:45:36,738 INFO L130 PetriNetUnfolder]: For 459/459 co-relation queries the response was YES. [2021-10-15 19:45:36,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 134 events. 15/134 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 310 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 460. Up to 33 conditions per place. [2021-10-15 19:45:36,740 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2021-10-15 19:45:36,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 34 transitions, 262 flow [2021-10-15 19:45:36,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 19:45:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 19:45:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 270 transitions. [2021-10-15 19:45:36,743 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2021-10-15 19:45:36,743 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 270 transitions. [2021-10-15 19:45:36,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 270 transitions. [2021-10-15 19:45:36,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:36,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 270 transitions. [2021-10-15 19:45:36,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 19.285714285714285) internal successors, (270), 14 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:36,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:36,747 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:36,747 INFO L186 Difference]: Start difference. First operand has 54 places, 32 transitions, 206 flow. Second operand 14 states and 270 transitions. [2021-10-15 19:45:36,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 34 transitions, 262 flow [2021-10-15 19:45:36,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 34 transitions, 230 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-10-15 19:45:36,753 INFO L242 Difference]: Finished difference. Result has 60 places, 34 transitions, 232 flow [2021-10-15 19:45:36,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=232, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2021-10-15 19:45:36,754 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 43 predicate places. [2021-10-15 19:45:36,754 INFO L470 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 232 flow [2021-10-15 19:45:36,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 9 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:36,754 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:36,755 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:36,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:36,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 19:45:36,973 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 2 times [2021-10-15 19:45:36,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:36,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415486520] [2021-10-15 19:45:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:36,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:36,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:36,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879847584] [2021-10-15 19:45:36,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:36,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:36,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:36,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 19:45:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:45:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:37,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:37,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415486520] [2021-10-15 19:45:37,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:37,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879847584] [2021-10-15 19:45:37,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879847584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:37,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:37,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 19:45:37,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748464349] [2021-10-15 19:45:37,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 19:45:37,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 19:45:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-15 19:45:37,348 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:37,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 34 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 19.6) internal successors, (196), 10 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:37,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:37,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:37,474 INFO L129 PetriNetUnfolder]: 18/157 cut-off events. [2021-10-15 19:45:37,474 INFO L130 PetriNetUnfolder]: For 656/656 co-relation queries the response was YES. [2021-10-15 19:45:37,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 157 events. 18/157 cut-off events. For 656/656 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 375 event pairs, 0 based on Foata normal form. 4/155 useless extension candidates. Maximal degree in co-relation 560. Up to 40 conditions per place. [2021-10-15 19:45:37,477 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 15 changer transitions 0/36 dead transitions. [2021-10-15 19:45:37,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 36 transitions, 296 flow [2021-10-15 19:45:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 19:45:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-10-15 19:45:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 308 transitions. [2021-10-15 19:45:37,480 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6875 [2021-10-15 19:45:37,481 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 308 transitions. [2021-10-15 19:45:37,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 308 transitions. [2021-10-15 19:45:37,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:37,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 308 transitions. [2021-10-15 19:45:37,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 19.25) internal successors, (308), 16 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 19:45:37,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,486 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,486 INFO L186 Difference]: Start difference. First operand has 60 places, 34 transitions, 232 flow. Second operand 16 states and 308 transitions. [2021-10-15 19:45:37,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 36 transitions, 296 flow [2021-10-15 19:45:37,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 36 transitions, 256 flow, removed 9 selfloop flow, removed 11 redundant places. [2021-10-15 19:45:37,494 INFO L242 Difference]: Finished difference. Result has 66 places, 36 transitions, 258 flow [2021-10-15 19:45:37,494 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=258, PETRI_PLACES=66, PETRI_TRANSITIONS=36} [2021-10-15 19:45:37,494 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 49 predicate places. [2021-10-15 19:45:37,495 INFO L470 AbstractCegarLoop]: Abstraction has has 66 places, 36 transitions, 258 flow [2021-10-15 19:45:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.6) internal successors, (196), 10 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:37,495 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:37,495 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:37,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:37,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 19:45:37,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 3 times [2021-10-15 19:45:37,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:37,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827929535] [2021-10-15 19:45:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:37,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:37,739 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:37,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006536962] [2021-10-15 19:45:37,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:37,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:37,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:37,755 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:37,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 19:45:37,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-15 19:45:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:37,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 19:45:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:38,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:38,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827929535] [2021-10-15 19:45:38,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:38,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006536962] [2021-10-15 19:45:38,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006536962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:38,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:38,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 19:45:38,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571463753] [2021-10-15 19:45:38,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 19:45:38,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:38,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 19:45:38,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-10-15 19:45:38,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:38,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 36 transitions, 258 flow. Second operand has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:38,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:38,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:38,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:38,426 INFO L129 PetriNetUnfolder]: 21/180 cut-off events. [2021-10-15 19:45:38,427 INFO L130 PetriNetUnfolder]: For 885/885 co-relation queries the response was YES. [2021-10-15 19:45:38,428 INFO L84 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 180 events. 21/180 cut-off events. For 885/885 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 440 event pairs, 0 based on Foata normal form. 4/177 useless extension candidates. Maximal degree in co-relation 660. Up to 47 conditions per place. [2021-10-15 19:45:38,429 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 17 changer transitions 0/38 dead transitions. [2021-10-15 19:45:38,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 38 transitions, 330 flow [2021-10-15 19:45:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 19:45:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-10-15 19:45:38,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 346 transitions. [2021-10-15 19:45:38,433 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2021-10-15 19:45:38,433 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 346 transitions. [2021-10-15 19:45:38,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 346 transitions. [2021-10-15 19:45:38,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:38,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 346 transitions. [2021-10-15 19:45:38,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 19.22222222222222) internal successors, (346), 18 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:38,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:38,438 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:38,438 INFO L186 Difference]: Start difference. First operand has 66 places, 36 transitions, 258 flow. Second operand 18 states and 346 transitions. [2021-10-15 19:45:38,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 38 transitions, 330 flow [2021-10-15 19:45:38,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 38 transitions, 282 flow, removed 11 selfloop flow, removed 13 redundant places. [2021-10-15 19:45:38,445 INFO L242 Difference]: Finished difference. Result has 72 places, 38 transitions, 284 flow [2021-10-15 19:45:38,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=284, PETRI_PLACES=72, PETRI_TRANSITIONS=38} [2021-10-15 19:45:38,445 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 55 predicate places. [2021-10-15 19:45:38,446 INFO L470 AbstractCegarLoop]: Abstraction has has 72 places, 38 transitions, 284 flow [2021-10-15 19:45:38,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.636363636363637) internal successors, (216), 11 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:38,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:38,446 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:38,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:38,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 19:45:38,669 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:38,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 4 times [2021-10-15 19:45:38,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:38,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446448352] [2021-10-15 19:45:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:38,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:38,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:38,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809294970] [2021-10-15 19:45:38,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:38,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:38,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:38,730 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:38,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 19:45:38,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:45:38,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:39,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:39,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446448352] [2021-10-15 19:45:39,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:39,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809294970] [2021-10-15 19:45:39,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809294970] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:39,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:39,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-10-15 19:45:39,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368117258] [2021-10-15 19:45:39,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 19:45:39,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 19:45:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-10-15 19:45:39,268 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:39,269 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 38 transitions, 284 flow. Second operand has 12 states, 12 states have (on average 19.666666666666668) internal successors, (236), 12 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:39,269 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:39,269 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:39,269 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:39,438 INFO L129 PetriNetUnfolder]: 24/203 cut-off events. [2021-10-15 19:45:39,438 INFO L130 PetriNetUnfolder]: For 1146/1146 co-relation queries the response was YES. [2021-10-15 19:45:39,439 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 203 events. 24/203 cut-off events. For 1146/1146 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 505 event pairs, 0 based on Foata normal form. 4/199 useless extension candidates. Maximal degree in co-relation 760. Up to 54 conditions per place. [2021-10-15 19:45:39,441 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 19 changer transitions 0/40 dead transitions. [2021-10-15 19:45:39,441 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 40 transitions, 364 flow [2021-10-15 19:45:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 19:45:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-15 19:45:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 384 transitions. [2021-10-15 19:45:39,444 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2021-10-15 19:45:39,444 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 384 transitions. [2021-10-15 19:45:39,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 384 transitions. [2021-10-15 19:45:39,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:39,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 384 transitions. [2021-10-15 19:45:39,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 19.2) internal successors, (384), 20 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:39,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 28.0) internal successors, (588), 21 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:39,450 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 28.0) internal successors, (588), 21 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:39,450 INFO L186 Difference]: Start difference. First operand has 72 places, 38 transitions, 284 flow. Second operand 20 states and 384 transitions. [2021-10-15 19:45:39,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 40 transitions, 364 flow [2021-10-15 19:45:39,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 40 transitions, 308 flow, removed 13 selfloop flow, removed 15 redundant places. [2021-10-15 19:45:39,459 INFO L242 Difference]: Finished difference. Result has 78 places, 40 transitions, 310 flow [2021-10-15 19:45:39,460 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=310, PETRI_PLACES=78, PETRI_TRANSITIONS=40} [2021-10-15 19:45:39,460 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 61 predicate places. [2021-10-15 19:45:39,460 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 40 transitions, 310 flow [2021-10-15 19:45:39,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.666666666666668) internal successors, (236), 12 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:39,461 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:39,461 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:39,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:39,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 19:45:39,681 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 5 times [2021-10-15 19:45:39,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:39,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394143948] [2021-10-15 19:45:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:39,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:39,694 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:39,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487310263] [2021-10-15 19:45:39,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:45:39,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:39,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:39,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 19:45:39,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-15 19:45:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:45:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:40,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394143948] [2021-10-15 19:45:40,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487310263] [2021-10-15 19:45:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487310263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:40,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:40,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 19:45:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190384157] [2021-10-15 19:45:40,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 19:45:40,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 19:45:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-15 19:45:40,204 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:40,205 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 40 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,205 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:40,205 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:40,205 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:40,384 INFO L129 PetriNetUnfolder]: 27/226 cut-off events. [2021-10-15 19:45:40,384 INFO L130 PetriNetUnfolder]: For 1439/1439 co-relation queries the response was YES. [2021-10-15 19:45:40,385 INFO L84 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 226 events. 27/226 cut-off events. For 1439/1439 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 570 event pairs, 0 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 860. Up to 61 conditions per place. [2021-10-15 19:45:40,387 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 21 changer transitions 0/42 dead transitions. [2021-10-15 19:45:40,388 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 42 transitions, 398 flow [2021-10-15 19:45:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 19:45:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-15 19:45:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 422 transitions. [2021-10-15 19:45:40,390 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.685064935064935 [2021-10-15 19:45:40,390 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 422 transitions. [2021-10-15 19:45:40,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 422 transitions. [2021-10-15 19:45:40,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:40,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 422 transitions. [2021-10-15 19:45:40,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 19.181818181818183) internal successors, (422), 22 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 28.0) internal successors, (644), 23 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,396 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 28.0) internal successors, (644), 23 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,396 INFO L186 Difference]: Start difference. First operand has 78 places, 40 transitions, 310 flow. Second operand 22 states and 422 transitions. [2021-10-15 19:45:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 42 transitions, 398 flow [2021-10-15 19:45:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 42 transitions, 334 flow, removed 15 selfloop flow, removed 17 redundant places. [2021-10-15 19:45:40,408 INFO L242 Difference]: Finished difference. Result has 84 places, 42 transitions, 336 flow [2021-10-15 19:45:40,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=336, PETRI_PLACES=84, PETRI_TRANSITIONS=42} [2021-10-15 19:45:40,408 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 67 predicate places. [2021-10-15 19:45:40,408 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 42 transitions, 336 flow [2021-10-15 19:45:40,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.692307692307693) internal successors, (256), 13 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:40,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:40,409 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:40,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:40,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-15 19:45:40,625 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:40,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:40,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 6 times [2021-10-15 19:45:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:40,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718695267] [2021-10-15 19:45:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:40,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:40,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:40,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533880104] [2021-10-15 19:45:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:45:40,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:40,650 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 19:45:40,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-15 19:45:40,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:40,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-15 19:45:40,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:41,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:41,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718695267] [2021-10-15 19:45:41,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:41,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533880104] [2021-10-15 19:45:41,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533880104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:41,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:41,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 19:45:41,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634451620] [2021-10-15 19:45:41,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 19:45:41,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 19:45:41,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-10-15 19:45:41,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:41,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 42 transitions, 336 flow. Second operand has 14 states, 14 states have (on average 19.714285714285715) internal successors, (276), 14 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:41,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:41,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:41,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:41,462 INFO L129 PetriNetUnfolder]: 30/249 cut-off events. [2021-10-15 19:45:41,462 INFO L130 PetriNetUnfolder]: For 1764/1764 co-relation queries the response was YES. [2021-10-15 19:45:41,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 987 conditions, 249 events. 30/249 cut-off events. For 1764/1764 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 635 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 960. Up to 68 conditions per place. [2021-10-15 19:45:41,466 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 23 changer transitions 0/44 dead transitions. [2021-10-15 19:45:41,467 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 44 transitions, 432 flow [2021-10-15 19:45:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-15 19:45:41,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-15 19:45:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 460 transitions. [2021-10-15 19:45:41,469 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2021-10-15 19:45:41,470 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 460 transitions. [2021-10-15 19:45:41,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 460 transitions. [2021-10-15 19:45:41,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:41,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 460 transitions. [2021-10-15 19:45:41,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:41,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:41,477 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:41,477 INFO L186 Difference]: Start difference. First operand has 84 places, 42 transitions, 336 flow. Second operand 24 states and 460 transitions. [2021-10-15 19:45:41,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 44 transitions, 432 flow [2021-10-15 19:45:41,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 44 transitions, 360 flow, removed 17 selfloop flow, removed 19 redundant places. [2021-10-15 19:45:41,491 INFO L242 Difference]: Finished difference. Result has 90 places, 44 transitions, 362 flow [2021-10-15 19:45:41,492 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=44} [2021-10-15 19:45:41,492 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 73 predicate places. [2021-10-15 19:45:41,492 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 44 transitions, 362 flow [2021-10-15 19:45:41,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.714285714285715) internal successors, (276), 14 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:41,493 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:41,493 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:41,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:41,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:41,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 7 times [2021-10-15 19:45:41,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:41,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4810214] [2021-10-15 19:45:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:41,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:41,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:41,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739281661] [2021-10-15 19:45:41,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:45:41,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:41,736 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:41,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-15 19:45:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 19:45:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:42,333 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:42,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4810214] [2021-10-15 19:45:42,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:42,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739281661] [2021-10-15 19:45:42,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739281661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:42,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:42,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 19:45:42,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69129023] [2021-10-15 19:45:42,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 19:45:42,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 19:45:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-10-15 19:45:42,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:42,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 44 transitions, 362 flow. Second operand has 15 states, 15 states have (on average 19.733333333333334) internal successors, (296), 15 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:42,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:42,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:42,550 INFO L129 PetriNetUnfolder]: 33/272 cut-off events. [2021-10-15 19:45:42,550 INFO L130 PetriNetUnfolder]: For 2121/2121 co-relation queries the response was YES. [2021-10-15 19:45:42,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 272 events. 33/272 cut-off events. For 2121/2121 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 700 event pairs, 0 based on Foata normal form. 4/265 useless extension candidates. Maximal degree in co-relation 1060. Up to 75 conditions per place. [2021-10-15 19:45:42,554 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 25 changer transitions 0/46 dead transitions. [2021-10-15 19:45:42,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 46 transitions, 466 flow [2021-10-15 19:45:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 19:45:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-15 19:45:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 498 transitions. [2021-10-15 19:45:42,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6840659340659341 [2021-10-15 19:45:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 498 transitions. [2021-10-15 19:45:42,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 498 transitions. [2021-10-15 19:45:42,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:42,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 498 transitions. [2021-10-15 19:45:42,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 19.153846153846153) internal successors, (498), 26 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 28.0) internal successors, (756), 27 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,562 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 28.0) internal successors, (756), 27 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,562 INFO L186 Difference]: Start difference. First operand has 90 places, 44 transitions, 362 flow. Second operand 26 states and 498 transitions. [2021-10-15 19:45:42,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 46 transitions, 466 flow [2021-10-15 19:45:42,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 46 transitions, 386 flow, removed 19 selfloop flow, removed 21 redundant places. [2021-10-15 19:45:42,577 INFO L242 Difference]: Finished difference. Result has 96 places, 46 transitions, 388 flow [2021-10-15 19:45:42,578 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=388, PETRI_PLACES=96, PETRI_TRANSITIONS=46} [2021-10-15 19:45:42,578 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 79 predicate places. [2021-10-15 19:45:42,578 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 46 transitions, 388 flow [2021-10-15 19:45:42,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.733333333333334) internal successors, (296), 15 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:42,579 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:42,579 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:42,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:42,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:42,793 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 8 times [2021-10-15 19:45:42,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:42,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421044446] [2021-10-15 19:45:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:42,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:42,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:42,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240759118] [2021-10-15 19:45:42,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:42,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:42,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:42,820 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:42,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-15 19:45:43,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 19:45:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:43,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:43,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421044446] [2021-10-15 19:45:43,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:43,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240759118] [2021-10-15 19:45:43,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240759118] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:43,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:43,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-10-15 19:45:43,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409239399] [2021-10-15 19:45:43,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 19:45:43,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 19:45:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-10-15 19:45:43,555 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:43,556 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 46 transitions, 388 flow. Second operand has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,556 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:43,556 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:43,556 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:43,813 INFO L129 PetriNetUnfolder]: 36/295 cut-off events. [2021-10-15 19:45:43,814 INFO L130 PetriNetUnfolder]: For 2510/2510 co-relation queries the response was YES. [2021-10-15 19:45:43,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 295 events. 36/295 cut-off events. For 2510/2510 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 765 event pairs, 0 based on Foata normal form. 4/287 useless extension candidates. Maximal degree in co-relation 1160. Up to 82 conditions per place. [2021-10-15 19:45:43,818 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 27 changer transitions 0/48 dead transitions. [2021-10-15 19:45:43,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 48 transitions, 500 flow [2021-10-15 19:45:43,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-15 19:45:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-15 19:45:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 536 transitions. [2021-10-15 19:45:43,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2021-10-15 19:45:43,821 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 536 transitions. [2021-10-15 19:45:43,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 536 transitions. [2021-10-15 19:45:43,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:43,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 536 transitions. [2021-10-15 19:45:43,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 19.142857142857142) internal successors, (536), 28 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 28.0) internal successors, (812), 29 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 19:45:43,827 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 28.0) internal successors, (812), 29 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 19:45:43,827 INFO L186 Difference]: Start difference. First operand has 96 places, 46 transitions, 388 flow. Second operand 28 states and 536 transitions. [2021-10-15 19:45:43,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 48 transitions, 500 flow [2021-10-15 19:45:43,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 48 transitions, 412 flow, removed 21 selfloop flow, removed 23 redundant places. [2021-10-15 19:45:43,846 INFO L242 Difference]: Finished difference. Result has 102 places, 48 transitions, 414 flow [2021-10-15 19:45:43,847 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=414, PETRI_PLACES=102, PETRI_TRANSITIONS=48} [2021-10-15 19:45:43,847 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 85 predicate places. [2021-10-15 19:45:43,847 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 48 transitions, 414 flow [2021-10-15 19:45:43,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.75) internal successors, (316), 16 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:43,848 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:43,848 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:43,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:44,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-15 19:45:44,061 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 9 times [2021-10-15 19:45:44,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:44,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231349234] [2021-10-15 19:45:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:44,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:44,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:44,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297836017] [2021-10-15 19:45:44,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:44,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:44,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:44,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-15 19:45:44,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-10-15 19:45:44,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 19:45:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:44,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:44,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231349234] [2021-10-15 19:45:44,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:44,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297836017] [2021-10-15 19:45:44,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297836017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:44,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:44,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-10-15 19:45:44,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125282363] [2021-10-15 19:45:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-15 19:45:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:44,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-15 19:45:44,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-10-15 19:45:44,854 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:44,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 48 transitions, 414 flow. Second operand has 17 states, 17 states have (on average 19.764705882352942) internal successors, (336), 17 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:44,855 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:44,855 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:44,855 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:45,152 INFO L129 PetriNetUnfolder]: 39/318 cut-off events. [2021-10-15 19:45:45,152 INFO L130 PetriNetUnfolder]: For 2931/2931 co-relation queries the response was YES. [2021-10-15 19:45:45,154 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 318 events. 39/318 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 830 event pairs, 0 based on Foata normal form. 4/309 useless extension candidates. Maximal degree in co-relation 1260. Up to 89 conditions per place. [2021-10-15 19:45:45,157 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 29 changer transitions 0/50 dead transitions. [2021-10-15 19:45:45,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 50 transitions, 534 flow [2021-10-15 19:45:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-15 19:45:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-15 19:45:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 574 transitions. [2021-10-15 19:45:45,168 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2021-10-15 19:45:45,169 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 574 transitions. [2021-10-15 19:45:45,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 574 transitions. [2021-10-15 19:45:45,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:45,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 574 transitions. [2021-10-15 19:45:45,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 19.133333333333333) internal successors, (574), 30 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,184 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,184 INFO L186 Difference]: Start difference. First operand has 102 places, 48 transitions, 414 flow. Second operand 30 states and 574 transitions. [2021-10-15 19:45:45,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 50 transitions, 534 flow [2021-10-15 19:45:45,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 50 transitions, 438 flow, removed 23 selfloop flow, removed 25 redundant places. [2021-10-15 19:45:45,212 INFO L242 Difference]: Finished difference. Result has 108 places, 50 transitions, 440 flow [2021-10-15 19:45:45,213 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=440, PETRI_PLACES=108, PETRI_TRANSITIONS=50} [2021-10-15 19:45:45,213 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 91 predicate places. [2021-10-15 19:45:45,213 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 50 transitions, 440 flow [2021-10-15 19:45:45,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.764705882352942) internal successors, (336), 17 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:45,214 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:45,214 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:45,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:45,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-15 19:45:45,441 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 10 times [2021-10-15 19:45:45,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:45,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054318559] [2021-10-15 19:45:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:45,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:45,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:45,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481747560] [2021-10-15 19:45:45,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:45,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:45,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:45,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:45,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-15 19:45:45,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:45,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 19:45:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:46,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:46,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054318559] [2021-10-15 19:45:46,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:46,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481747560] [2021-10-15 19:45:46,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481747560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:46,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:46,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-10-15 19:45:46,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843476239] [2021-10-15 19:45:46,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-15 19:45:46,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-15 19:45:46,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-10-15 19:45:46,261 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:46,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 50 transitions, 440 flow. Second operand has 18 states, 18 states have (on average 19.77777777777778) internal successors, (356), 18 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:46,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:46,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:46,588 INFO L129 PetriNetUnfolder]: 42/341 cut-off events. [2021-10-15 19:45:46,588 INFO L130 PetriNetUnfolder]: For 3384/3384 co-relation queries the response was YES. [2021-10-15 19:45:46,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 341 events. 42/341 cut-off events. For 3384/3384 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 895 event pairs, 0 based on Foata normal form. 4/331 useless extension candidates. Maximal degree in co-relation 1360. Up to 96 conditions per place. [2021-10-15 19:45:46,593 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 31 changer transitions 0/52 dead transitions. [2021-10-15 19:45:46,593 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 52 transitions, 568 flow [2021-10-15 19:45:46,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-15 19:45:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-15 19:45:46,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 612 transitions. [2021-10-15 19:45:46,599 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6830357142857143 [2021-10-15 19:45:46,600 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 612 transitions. [2021-10-15 19:45:46,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 612 transitions. [2021-10-15 19:45:46,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:46,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 612 transitions. [2021-10-15 19:45:46,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 19.125) internal successors, (612), 32 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 28.0) internal successors, (924), 33 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,612 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 28.0) internal successors, (924), 33 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,612 INFO L186 Difference]: Start difference. First operand has 108 places, 50 transitions, 440 flow. Second operand 32 states and 612 transitions. [2021-10-15 19:45:46,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 52 transitions, 568 flow [2021-10-15 19:45:46,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 52 transitions, 464 flow, removed 25 selfloop flow, removed 27 redundant places. [2021-10-15 19:45:46,641 INFO L242 Difference]: Finished difference. Result has 114 places, 52 transitions, 466 flow [2021-10-15 19:45:46,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=466, PETRI_PLACES=114, PETRI_TRANSITIONS=52} [2021-10-15 19:45:46,643 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 97 predicate places. [2021-10-15 19:45:46,643 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 52 transitions, 466 flow [2021-10-15 19:45:46,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.77777777777778) internal successors, (356), 18 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:46,644 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:46,644 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:46,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:46,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:46,864 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 11 times [2021-10-15 19:45:46,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:46,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144656124] [2021-10-15 19:45:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:46,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:46,888 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:46,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699049336] [2021-10-15 19:45:46,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:45:46,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:46,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:46,890 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:46,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-15 19:45:47,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-15 19:45:47,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-15 19:45:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:47,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:47,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144656124] [2021-10-15 19:45:47,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:47,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699049336] [2021-10-15 19:45:47,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699049336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:47,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:47,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-10-15 19:45:47,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786879363] [2021-10-15 19:45:47,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-15 19:45:47,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-15 19:45:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-10-15 19:45:47,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:47,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 52 transitions, 466 flow. Second operand has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:47,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:47,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:47,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:48,108 INFO L129 PetriNetUnfolder]: 45/364 cut-off events. [2021-10-15 19:45:48,108 INFO L130 PetriNetUnfolder]: For 3869/3869 co-relation queries the response was YES. [2021-10-15 19:45:48,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 364 events. 45/364 cut-off events. For 3869/3869 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 960 event pairs, 0 based on Foata normal form. 4/353 useless extension candidates. Maximal degree in co-relation 1460. Up to 103 conditions per place. [2021-10-15 19:45:48,113 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 33 changer transitions 0/54 dead transitions. [2021-10-15 19:45:48,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 54 transitions, 602 flow [2021-10-15 19:45:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-15 19:45:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-10-15 19:45:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 650 transitions. [2021-10-15 19:45:48,116 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6827731092436975 [2021-10-15 19:45:48,117 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 650 transitions. [2021-10-15 19:45:48,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 650 transitions. [2021-10-15 19:45:48,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:48,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 650 transitions. [2021-10-15 19:45:48,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 19.11764705882353) internal successors, (650), 34 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:48,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 28.0) internal successors, (980), 35 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:48,124 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 28.0) internal successors, (980), 35 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:48,124 INFO L186 Difference]: Start difference. First operand has 114 places, 52 transitions, 466 flow. Second operand 34 states and 650 transitions. [2021-10-15 19:45:48,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 54 transitions, 602 flow [2021-10-15 19:45:48,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 54 transitions, 490 flow, removed 27 selfloop flow, removed 29 redundant places. [2021-10-15 19:45:48,153 INFO L242 Difference]: Finished difference. Result has 120 places, 54 transitions, 492 flow [2021-10-15 19:45:48,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=492, PETRI_PLACES=120, PETRI_TRANSITIONS=54} [2021-10-15 19:45:48,154 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 103 predicate places. [2021-10-15 19:45:48,154 INFO L470 AbstractCegarLoop]: Abstraction has has 120 places, 54 transitions, 492 flow [2021-10-15 19:45:48,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.789473684210527) internal successors, (376), 19 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:48,161 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:48,162 INFO L254 CegarLoopForPetriNet]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:48,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:48,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:48,389 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:48,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:48,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 12 times [2021-10-15 19:45:48,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:48,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030190100] [2021-10-15 19:45:48,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:48,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:48,407 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:48,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820097215] [2021-10-15 19:45:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:45:48,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:48,409 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:48,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 19:45:49,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-10-15 19:45:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:49,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 19:45:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:49,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:49,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030190100] [2021-10-15 19:45:49,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:49,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820097215] [2021-10-15 19:45:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820097215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:49,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:49,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-10-15 19:45:49,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635090256] [2021-10-15 19:45:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-15 19:45:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-15 19:45:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-10-15 19:45:49,529 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:49,531 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 54 transitions, 492 flow. Second operand has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,531 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:49,531 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:49,531 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:49,926 INFO L129 PetriNetUnfolder]: 48/387 cut-off events. [2021-10-15 19:45:49,927 INFO L130 PetriNetUnfolder]: For 4386/4386 co-relation queries the response was YES. [2021-10-15 19:45:49,930 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 387 events. 48/387 cut-off events. For 4386/4386 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1025 event pairs, 0 based on Foata normal form. 4/375 useless extension candidates. Maximal degree in co-relation 1560. Up to 110 conditions per place. [2021-10-15 19:45:49,933 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 35 changer transitions 0/56 dead transitions. [2021-10-15 19:45:49,933 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 56 transitions, 636 flow [2021-10-15 19:45:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-15 19:45:49,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-15 19:45:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 688 transitions. [2021-10-15 19:45:49,936 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2021-10-15 19:45:49,937 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 688 transitions. [2021-10-15 19:45:49,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 688 transitions. [2021-10-15 19:45:49,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:49,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 688 transitions. [2021-10-15 19:45:49,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 19.11111111111111) internal successors, (688), 36 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 28.0) internal successors, (1036), 37 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,944 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 28.0) internal successors, (1036), 37 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,944 INFO L186 Difference]: Start difference. First operand has 120 places, 54 transitions, 492 flow. Second operand 36 states and 688 transitions. [2021-10-15 19:45:49,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 56 transitions, 636 flow [2021-10-15 19:45:49,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 56 transitions, 516 flow, removed 29 selfloop flow, removed 31 redundant places. [2021-10-15 19:45:49,978 INFO L242 Difference]: Finished difference. Result has 126 places, 56 transitions, 518 flow [2021-10-15 19:45:49,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=518, PETRI_PLACES=126, PETRI_TRANSITIONS=56} [2021-10-15 19:45:49,979 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 109 predicate places. [2021-10-15 19:45:49,979 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 56 transitions, 518 flow [2021-10-15 19:45:49,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.8) internal successors, (396), 20 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:49,980 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:49,980 INFO L254 CegarLoopForPetriNet]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:50,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:50,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-15 19:45:50,197 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:50,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:50,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 13 times [2021-10-15 19:45:50,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:50,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184984959] [2021-10-15 19:45:50,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:50,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:50,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:50,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168946870] [2021-10-15 19:45:50,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:45:50,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:50,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:50,221 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:50,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-15 19:45:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:45:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-15 19:45:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:51,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184984959] [2021-10-15 19:45:51,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:51,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168946870] [2021-10-15 19:45:51,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168946870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:51,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:51,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-10-15 19:45:51,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779534345] [2021-10-15 19:45:51,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-15 19:45:51,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-15 19:45:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-10-15 19:45:51,207 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:51,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 56 transitions, 518 flow. Second operand has 21 states, 21 states have (on average 19.80952380952381) internal successors, (416), 21 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:51,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:51,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:51,612 INFO L129 PetriNetUnfolder]: 51/410 cut-off events. [2021-10-15 19:45:51,612 INFO L130 PetriNetUnfolder]: For 4935/4935 co-relation queries the response was YES. [2021-10-15 19:45:51,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1701 conditions, 410 events. 51/410 cut-off events. For 4935/4935 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1090 event pairs, 0 based on Foata normal form. 4/397 useless extension candidates. Maximal degree in co-relation 1660. Up to 117 conditions per place. [2021-10-15 19:45:51,618 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 37 changer transitions 0/58 dead transitions. [2021-10-15 19:45:51,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 58 transitions, 670 flow [2021-10-15 19:45:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-15 19:45:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-10-15 19:45:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 726 transitions. [2021-10-15 19:45:51,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6823308270676691 [2021-10-15 19:45:51,624 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 726 transitions. [2021-10-15 19:45:51,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 726 transitions. [2021-10-15 19:45:51,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:51,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 726 transitions. [2021-10-15 19:45:51,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 19.105263157894736) internal successors, (726), 38 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 28.0) internal successors, (1092), 39 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,653 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 28.0) internal successors, (1092), 39 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,653 INFO L186 Difference]: Start difference. First operand has 126 places, 56 transitions, 518 flow. Second operand 38 states and 726 transitions. [2021-10-15 19:45:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 58 transitions, 670 flow [2021-10-15 19:45:51,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 58 transitions, 542 flow, removed 31 selfloop flow, removed 33 redundant places. [2021-10-15 19:45:51,688 INFO L242 Difference]: Finished difference. Result has 132 places, 58 transitions, 544 flow [2021-10-15 19:45:51,689 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=544, PETRI_PLACES=132, PETRI_TRANSITIONS=58} [2021-10-15 19:45:51,689 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 115 predicate places. [2021-10-15 19:45:51,689 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 58 transitions, 544 flow [2021-10-15 19:45:51,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.80952380952381) internal successors, (416), 21 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:51,690 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:51,690 INFO L254 CegarLoopForPetriNet]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:51,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:51,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:51,917 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 14 times [2021-10-15 19:45:51,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:51,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983061649] [2021-10-15 19:45:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:51,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:51,943 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:51,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988603160] [2021-10-15 19:45:51,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:45:51,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:51,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:51,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-15 19:45:52,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:45:52,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:52,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 19:45:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:53,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:53,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983061649] [2021-10-15 19:45:53,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:53,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988603160] [2021-10-15 19:45:53,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988603160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:53,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:53,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-10-15 19:45:53,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953577624] [2021-10-15 19:45:53,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 19:45:53,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 19:45:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-10-15 19:45:53,034 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:53,034 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 58 transitions, 544 flow. Second operand has 22 states, 22 states have (on average 19.818181818181817) internal successors, (436), 22 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:53,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:53,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:53,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:53,447 INFO L129 PetriNetUnfolder]: 54/433 cut-off events. [2021-10-15 19:45:53,447 INFO L130 PetriNetUnfolder]: For 5516/5516 co-relation queries the response was YES. [2021-10-15 19:45:53,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1803 conditions, 433 events. 54/433 cut-off events. For 5516/5516 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1155 event pairs, 0 based on Foata normal form. 4/419 useless extension candidates. Maximal degree in co-relation 1760. Up to 124 conditions per place. [2021-10-15 19:45:53,453 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 39 changer transitions 0/60 dead transitions. [2021-10-15 19:45:53,453 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 60 transitions, 704 flow [2021-10-15 19:45:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-15 19:45:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-15 19:45:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 764 transitions. [2021-10-15 19:45:53,456 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2021-10-15 19:45:53,456 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 764 transitions. [2021-10-15 19:45:53,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 764 transitions. [2021-10-15 19:45:53,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:53,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 764 transitions. [2021-10-15 19:45:53,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 19.1) internal successors, (764), 40 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:53,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:53,463 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:53,463 INFO L186 Difference]: Start difference. First operand has 132 places, 58 transitions, 544 flow. Second operand 40 states and 764 transitions. [2021-10-15 19:45:53,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 60 transitions, 704 flow [2021-10-15 19:45:53,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 60 transitions, 568 flow, removed 33 selfloop flow, removed 35 redundant places. [2021-10-15 19:45:53,502 INFO L242 Difference]: Finished difference. Result has 138 places, 60 transitions, 570 flow [2021-10-15 19:45:53,502 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=570, PETRI_PLACES=138, PETRI_TRANSITIONS=60} [2021-10-15 19:45:53,502 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 121 predicate places. [2021-10-15 19:45:53,503 INFO L470 AbstractCegarLoop]: Abstraction has has 138 places, 60 transitions, 570 flow [2021-10-15 19:45:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.818181818181817) internal successors, (436), 22 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:53,503 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:53,503 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:53,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:53,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-15 19:45:53,717 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 15 times [2021-10-15 19:45:53,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:53,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085909273] [2021-10-15 19:45:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:53,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:53,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95865546] [2021-10-15 19:45:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:45:53,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:53,736 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:53,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-15 19:45:54,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-10-15 19:45:54,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-15 19:45:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:54,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085909273] [2021-10-15 19:45:54,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95865546] [2021-10-15 19:45:54,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95865546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:54,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:54,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-10-15 19:45:54,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846645797] [2021-10-15 19:45:54,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-15 19:45:54,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-15 19:45:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-10-15 19:45:54,926 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:54,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 60 transitions, 570 flow. Second operand has 23 states, 23 states have (on average 19.82608695652174) internal successors, (456), 23 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:54,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:54,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:54,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:55,422 INFO L129 PetriNetUnfolder]: 57/456 cut-off events. [2021-10-15 19:45:55,423 INFO L130 PetriNetUnfolder]: For 6129/6129 co-relation queries the response was YES. [2021-10-15 19:45:55,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 456 events. 57/456 cut-off events. For 6129/6129 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1220 event pairs, 0 based on Foata normal form. 4/441 useless extension candidates. Maximal degree in co-relation 1860. Up to 131 conditions per place. [2021-10-15 19:45:55,429 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 41 changer transitions 0/62 dead transitions. [2021-10-15 19:45:55,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 62 transitions, 738 flow [2021-10-15 19:45:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-15 19:45:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-15 19:45:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 802 transitions. [2021-10-15 19:45:55,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6819727891156463 [2021-10-15 19:45:55,433 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 802 transitions. [2021-10-15 19:45:55,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 802 transitions. [2021-10-15 19:45:55,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:55,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 802 transitions. [2021-10-15 19:45:55,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 19.095238095238095) internal successors, (802), 42 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 28.0) internal successors, (1204), 43 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,439 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 28.0) internal successors, (1204), 43 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,440 INFO L186 Difference]: Start difference. First operand has 138 places, 60 transitions, 570 flow. Second operand 42 states and 802 transitions. [2021-10-15 19:45:55,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 62 transitions, 738 flow [2021-10-15 19:45:55,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 62 transitions, 594 flow, removed 35 selfloop flow, removed 37 redundant places. [2021-10-15 19:45:55,482 INFO L242 Difference]: Finished difference. Result has 144 places, 62 transitions, 596 flow [2021-10-15 19:45:55,482 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=596, PETRI_PLACES=144, PETRI_TRANSITIONS=62} [2021-10-15 19:45:55,482 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 127 predicate places. [2021-10-15 19:45:55,483 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 62 transitions, 596 flow [2021-10-15 19:45:55,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.82608695652174) internal successors, (456), 23 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:55,483 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:55,483 INFO L254 CegarLoopForPetriNet]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:55,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:55,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:55,709 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 16 times [2021-10-15 19:45:55,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:55,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778901606] [2021-10-15 19:45:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:55,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:55,723 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:55,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996001788] [2021-10-15 19:45:55,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:45:55,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:55,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:55,725 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:55,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-15 19:45:56,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:45:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 19:45:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:56,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:56,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778901606] [2021-10-15 19:45:56,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:56,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996001788] [2021-10-15 19:45:56,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996001788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:56,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:56,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-10-15 19:45:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803637386] [2021-10-15 19:45:56,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-15 19:45:56,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-15 19:45:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-10-15 19:45:56,891 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:56,892 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 62 transitions, 596 flow. Second operand has 24 states, 24 states have (on average 19.833333333333332) internal successors, (476), 24 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:56,892 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:56,892 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:56,893 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:57,345 INFO L129 PetriNetUnfolder]: 60/479 cut-off events. [2021-10-15 19:45:57,345 INFO L130 PetriNetUnfolder]: For 6774/6774 co-relation queries the response was YES. [2021-10-15 19:45:57,349 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 479 events. 60/479 cut-off events. For 6774/6774 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1285 event pairs, 0 based on Foata normal form. 4/463 useless extension candidates. Maximal degree in co-relation 1960. Up to 138 conditions per place. [2021-10-15 19:45:57,353 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 43 changer transitions 0/64 dead transitions. [2021-10-15 19:45:57,353 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 64 transitions, 772 flow [2021-10-15 19:45:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-15 19:45:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-15 19:45:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 840 transitions. [2021-10-15 19:45:57,356 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2021-10-15 19:45:57,356 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 840 transitions. [2021-10-15 19:45:57,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 840 transitions. [2021-10-15 19:45:57,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:57,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 840 transitions. [2021-10-15 19:45:57,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 19.09090909090909) internal successors, (840), 44 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,381 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,381 INFO L186 Difference]: Start difference. First operand has 144 places, 62 transitions, 596 flow. Second operand 44 states and 840 transitions. [2021-10-15 19:45:57,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 64 transitions, 772 flow [2021-10-15 19:45:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 64 transitions, 620 flow, removed 37 selfloop flow, removed 39 redundant places. [2021-10-15 19:45:57,432 INFO L242 Difference]: Finished difference. Result has 150 places, 64 transitions, 622 flow [2021-10-15 19:45:57,432 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=622, PETRI_PLACES=150, PETRI_TRANSITIONS=64} [2021-10-15 19:45:57,432 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 133 predicate places. [2021-10-15 19:45:57,433 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 64 transitions, 622 flow [2021-10-15 19:45:57,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.833333333333332) internal successors, (476), 24 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:57,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:57,434 INFO L254 CegarLoopForPetriNet]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:57,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:57,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:57,649 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:57,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:57,649 INFO L82 PathProgramCache]: Analyzing trace with hash -163561255, now seen corresponding path program 17 times [2021-10-15 19:45:57,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:57,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580243029] [2021-10-15 19:45:57,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:57,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:57,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:57,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133348246] [2021-10-15 19:45:57,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:45:57,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:57,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:57,665 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:57,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-15 19:45:58,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-10-15 19:45:58,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:45:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 19:45:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:45:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:45:59,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:45:59,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580243029] [2021-10-15 19:45:59,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:45:59,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133348246] [2021-10-15 19:45:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133348246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:45:59,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:45:59,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-10-15 19:45:59,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441222563] [2021-10-15 19:45:59,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-15 19:45:59,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:45:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-15 19:45:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-10-15 19:45:59,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:45:59,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 64 transitions, 622 flow. Second operand has 25 states, 25 states have (on average 19.84) internal successors, (496), 25 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:59,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:45:59,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:45:59,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:45:59,594 INFO L129 PetriNetUnfolder]: 63/502 cut-off events. [2021-10-15 19:45:59,595 INFO L130 PetriNetUnfolder]: For 7451/7451 co-relation queries the response was YES. [2021-10-15 19:45:59,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2109 conditions, 502 events. 63/502 cut-off events. For 7451/7451 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1350 event pairs, 0 based on Foata normal form. 4/485 useless extension candidates. Maximal degree in co-relation 2060. Up to 145 conditions per place. [2021-10-15 19:45:59,603 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 45 changer transitions 0/66 dead transitions. [2021-10-15 19:45:59,604 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 66 transitions, 806 flow [2021-10-15 19:45:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-15 19:45:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-10-15 19:45:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 878 transitions. [2021-10-15 19:45:59,606 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6816770186335404 [2021-10-15 19:45:59,606 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 878 transitions. [2021-10-15 19:45:59,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 878 transitions. [2021-10-15 19:45:59,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:45:59,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 878 transitions. [2021-10-15 19:45:59,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 19.08695652173913) internal successors, (878), 46 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:59,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 28.0) internal successors, (1316), 47 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:59,612 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 28.0) internal successors, (1316), 47 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:59,612 INFO L186 Difference]: Start difference. First operand has 150 places, 64 transitions, 622 flow. Second operand 46 states and 878 transitions. [2021-10-15 19:45:59,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 66 transitions, 806 flow [2021-10-15 19:45:59,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 66 transitions, 646 flow, removed 39 selfloop flow, removed 41 redundant places. [2021-10-15 19:45:59,662 INFO L242 Difference]: Finished difference. Result has 156 places, 66 transitions, 648 flow [2021-10-15 19:45:59,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=648, PETRI_PLACES=156, PETRI_TRANSITIONS=66} [2021-10-15 19:45:59,664 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 139 predicate places. [2021-10-15 19:45:59,664 INFO L470 AbstractCegarLoop]: Abstraction has has 156 places, 66 transitions, 648 flow [2021-10-15 19:45:59,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 19.84) internal successors, (496), 25 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:45:59,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:45:59,665 INFO L254 CegarLoopForPetriNet]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:45:59,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-15 19:45:59,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 19:45:59,893 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:45:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:45:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 18 times [2021-10-15 19:45:59,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:45:59,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095499039] [2021-10-15 19:45:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:45:59,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:45:59,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:45:59,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962767311] [2021-10-15 19:45:59,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:45:59,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:45:59,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:45:59,915 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:45:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-15 19:46:00,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-10-15 19:46:00,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-15 19:46:00,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:01,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:01,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095499039] [2021-10-15 19:46:01,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:01,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962767311] [2021-10-15 19:46:01,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962767311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:01,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:01,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-10-15 19:46:01,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570083035] [2021-10-15 19:46:01,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 19:46:01,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:01,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 19:46:01,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-10-15 19:46:01,322 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:01,323 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 66 transitions, 648 flow. Second operand has 26 states, 26 states have (on average 19.846153846153847) internal successors, (516), 26 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:01,323 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:01,323 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:01,323 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:01,856 INFO L129 PetriNetUnfolder]: 66/525 cut-off events. [2021-10-15 19:46:01,857 INFO L130 PetriNetUnfolder]: For 8160/8160 co-relation queries the response was YES. [2021-10-15 19:46:01,861 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 525 events. 66/525 cut-off events. For 8160/8160 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1415 event pairs, 0 based on Foata normal form. 4/507 useless extension candidates. Maximal degree in co-relation 2160. Up to 152 conditions per place. [2021-10-15 19:46:01,865 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 47 changer transitions 0/68 dead transitions. [2021-10-15 19:46:01,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 68 transitions, 840 flow [2021-10-15 19:46:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-15 19:46:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-10-15 19:46:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 916 transitions. [2021-10-15 19:46:01,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2021-10-15 19:46:01,868 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 916 transitions. [2021-10-15 19:46:01,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 916 transitions. [2021-10-15 19:46:01,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:01,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 916 transitions. [2021-10-15 19:46:01,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 19.083333333333332) internal successors, (916), 48 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:01,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 28.0) internal successors, (1372), 49 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:01,875 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 28.0) internal successors, (1372), 49 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:01,875 INFO L186 Difference]: Start difference. First operand has 156 places, 66 transitions, 648 flow. Second operand 48 states and 916 transitions. [2021-10-15 19:46:01,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 68 transitions, 840 flow [2021-10-15 19:46:01,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 68 transitions, 672 flow, removed 41 selfloop flow, removed 43 redundant places. [2021-10-15 19:46:01,930 INFO L242 Difference]: Finished difference. Result has 162 places, 68 transitions, 674 flow [2021-10-15 19:46:01,931 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=674, PETRI_PLACES=162, PETRI_TRANSITIONS=68} [2021-10-15 19:46:01,931 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 145 predicate places. [2021-10-15 19:46:01,931 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 68 transitions, 674 flow [2021-10-15 19:46:01,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.846153846153847) internal successors, (516), 26 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:01,932 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:01,932 INFO L254 CegarLoopForPetriNet]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:01,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:02,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 19:46:02,141 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1054868455, now seen corresponding path program 19 times [2021-10-15 19:46:02,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:02,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78436451] [2021-10-15 19:46:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:02,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:02,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:02,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299076577] [2021-10-15 19:46:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:46:02,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:02,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:02,161 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:02,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-15 19:46:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:46:02,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-15 19:46:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:03,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:03,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78436451] [2021-10-15 19:46:03,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:03,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299076577] [2021-10-15 19:46:03,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299076577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:03,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:03,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-10-15 19:46:03,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119589411] [2021-10-15 19:46:03,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-15 19:46:03,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-15 19:46:03,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-10-15 19:46:03,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:03,646 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 68 transitions, 674 flow. Second operand has 27 states, 27 states have (on average 19.85185185185185) internal successors, (536), 27 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:03,646 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:03,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:03,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:04,303 INFO L129 PetriNetUnfolder]: 69/548 cut-off events. [2021-10-15 19:46:04,303 INFO L130 PetriNetUnfolder]: For 8901/8901 co-relation queries the response was YES. [2021-10-15 19:46:04,308 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 548 events. 69/548 cut-off events. For 8901/8901 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1480 event pairs, 0 based on Foata normal form. 4/529 useless extension candidates. Maximal degree in co-relation 2260. Up to 159 conditions per place. [2021-10-15 19:46:04,312 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 49 changer transitions 0/70 dead transitions. [2021-10-15 19:46:04,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 70 transitions, 874 flow [2021-10-15 19:46:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-15 19:46:04,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-10-15 19:46:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 954 transitions. [2021-10-15 19:46:04,315 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6814285714285714 [2021-10-15 19:46:04,315 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 954 transitions. [2021-10-15 19:46:04,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 954 transitions. [2021-10-15 19:46:04,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:04,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 954 transitions. [2021-10-15 19:46:04,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 19.08) internal successors, (954), 50 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:04,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 28.0) internal successors, (1428), 51 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:04,323 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 28.0) internal successors, (1428), 51 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:04,323 INFO L186 Difference]: Start difference. First operand has 162 places, 68 transitions, 674 flow. Second operand 50 states and 954 transitions. [2021-10-15 19:46:04,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 70 transitions, 874 flow [2021-10-15 19:46:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 70 transitions, 698 flow, removed 43 selfloop flow, removed 45 redundant places. [2021-10-15 19:46:04,391 INFO L242 Difference]: Finished difference. Result has 168 places, 70 transitions, 700 flow [2021-10-15 19:46:04,391 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=700, PETRI_PLACES=168, PETRI_TRANSITIONS=70} [2021-10-15 19:46:04,392 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 151 predicate places. [2021-10-15 19:46:04,392 INFO L470 AbstractCegarLoop]: Abstraction has has 168 places, 70 transitions, 700 flow [2021-10-15 19:46:04,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 19.85185185185185) internal successors, (536), 27 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:04,393 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:04,393 INFO L254 CegarLoopForPetriNet]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:04,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-15 19:46:04,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 19:46:04,605 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash -909901397, now seen corresponding path program 20 times [2021-10-15 19:46:04,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:04,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875900347] [2021-10-15 19:46:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:04,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:04,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:04,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732782351] [2021-10-15 19:46:04,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:46:04,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:04,624 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:04,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-15 19:46:05,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:46:05,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:05,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-15 19:46:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:06,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:06,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875900347] [2021-10-15 19:46:06,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:06,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732782351] [2021-10-15 19:46:06,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732782351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:06,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:06,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-10-15 19:46:06,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683626136] [2021-10-15 19:46:06,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 19:46:06,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 19:46:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-10-15 19:46:06,170 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:06,170 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 70 transitions, 700 flow. Second operand has 28 states, 28 states have (on average 19.857142857142858) internal successors, (556), 28 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:06,170 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:06,170 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:06,170 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:06,763 INFO L129 PetriNetUnfolder]: 72/571 cut-off events. [2021-10-15 19:46:06,763 INFO L130 PetriNetUnfolder]: For 9674/9674 co-relation queries the response was YES. [2021-10-15 19:46:06,767 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2415 conditions, 571 events. 72/571 cut-off events. For 9674/9674 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1545 event pairs, 0 based on Foata normal form. 4/551 useless extension candidates. Maximal degree in co-relation 2360. Up to 166 conditions per place. [2021-10-15 19:46:06,770 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 51 changer transitions 0/72 dead transitions. [2021-10-15 19:46:06,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 72 transitions, 908 flow [2021-10-15 19:46:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-15 19:46:06,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-10-15 19:46:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 992 transitions. [2021-10-15 19:46:06,773 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6813186813186813 [2021-10-15 19:46:06,773 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 992 transitions. [2021-10-15 19:46:06,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 992 transitions. [2021-10-15 19:46:06,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:06,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 992 transitions. [2021-10-15 19:46:06,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 19.076923076923077) internal successors, (992), 52 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:06,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 28.0) internal successors, (1484), 53 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:06,781 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 28.0) internal successors, (1484), 53 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:06,781 INFO L186 Difference]: Start difference. First operand has 168 places, 70 transitions, 700 flow. Second operand 52 states and 992 transitions. [2021-10-15 19:46:06,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 72 transitions, 908 flow [2021-10-15 19:46:06,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 72 transitions, 724 flow, removed 45 selfloop flow, removed 47 redundant places. [2021-10-15 19:46:06,854 INFO L242 Difference]: Finished difference. Result has 174 places, 72 transitions, 726 flow [2021-10-15 19:46:06,854 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=726, PETRI_PLACES=174, PETRI_TRANSITIONS=72} [2021-10-15 19:46:06,854 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 157 predicate places. [2021-10-15 19:46:06,855 INFO L470 AbstractCegarLoop]: Abstraction has has 174 places, 72 transitions, 726 flow [2021-10-15 19:46:06,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 19.857142857142858) internal successors, (556), 28 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:06,855 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:06,855 INFO L254 CegarLoopForPetriNet]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:06,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:07,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 19:46:07,081 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 150906713, now seen corresponding path program 21 times [2021-10-15 19:46:07,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:07,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680736703] [2021-10-15 19:46:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:07,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:07,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:07,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532093097] [2021-10-15 19:46:07,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:46:07,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:07,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:07,104 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:07,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-15 19:46:07,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-10-15 19:46:07,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-15 19:46:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:08,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:08,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680736703] [2021-10-15 19:46:08,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:08,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532093097] [2021-10-15 19:46:08,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532093097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:08,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:08,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-10-15 19:46:08,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168683170] [2021-10-15 19:46:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-15 19:46:08,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-15 19:46:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-10-15 19:46:08,786 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:08,787 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 72 transitions, 726 flow. Second operand has 29 states, 29 states have (on average 19.862068965517242) internal successors, (576), 29 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:08,787 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:08,787 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:08,787 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:09,394 INFO L129 PetriNetUnfolder]: 75/594 cut-off events. [2021-10-15 19:46:09,394 INFO L130 PetriNetUnfolder]: For 10479/10479 co-relation queries the response was YES. [2021-10-15 19:46:09,400 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2517 conditions, 594 events. 75/594 cut-off events. For 10479/10479 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1610 event pairs, 0 based on Foata normal form. 4/573 useless extension candidates. Maximal degree in co-relation 2460. Up to 173 conditions per place. [2021-10-15 19:46:09,404 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 53 changer transitions 0/74 dead transitions. [2021-10-15 19:46:09,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 74 transitions, 942 flow [2021-10-15 19:46:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-15 19:46:09,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-10-15 19:46:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1030 transitions. [2021-10-15 19:46:09,408 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6812169312169312 [2021-10-15 19:46:09,409 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 1030 transitions. [2021-10-15 19:46:09,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 1030 transitions. [2021-10-15 19:46:09,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:09,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 1030 transitions. [2021-10-15 19:46:09,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 19.074074074074073) internal successors, (1030), 54 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:09,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 28.0) internal successors, (1540), 55 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:09,416 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 28.0) internal successors, (1540), 55 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:09,417 INFO L186 Difference]: Start difference. First operand has 174 places, 72 transitions, 726 flow. Second operand 54 states and 1030 transitions. [2021-10-15 19:46:09,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 74 transitions, 942 flow [2021-10-15 19:46:09,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 74 transitions, 750 flow, removed 47 selfloop flow, removed 49 redundant places. [2021-10-15 19:46:09,498 INFO L242 Difference]: Finished difference. Result has 180 places, 74 transitions, 752 flow [2021-10-15 19:46:09,499 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=752, PETRI_PLACES=180, PETRI_TRANSITIONS=74} [2021-10-15 19:46:09,499 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 163 predicate places. [2021-10-15 19:46:09,499 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 74 transitions, 752 flow [2021-10-15 19:46:09,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 19.862068965517242) internal successors, (576), 29 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:09,500 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:09,500 INFO L254 CegarLoopForPetriNet]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:09,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:09,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:09,717 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:09,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:09,717 INFO L82 PathProgramCache]: Analyzing trace with hash -158441877, now seen corresponding path program 22 times [2021-10-15 19:46:09,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:09,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540384433] [2021-10-15 19:46:09,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:09,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:09,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:09,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594395083] [2021-10-15 19:46:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:46:09,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:09,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:09,744 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:09,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-15 19:46:10,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:46:10,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:10,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-15 19:46:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:11,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540384433] [2021-10-15 19:46:11,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:11,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594395083] [2021-10-15 19:46:11,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594395083] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:11,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:11,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-10-15 19:46:11,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720761197] [2021-10-15 19:46:11,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-15 19:46:11,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-15 19:46:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-10-15 19:46:11,396 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:11,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 74 transitions, 752 flow. Second operand has 30 states, 30 states have (on average 19.866666666666667) internal successors, (596), 30 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:11,397 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:11,397 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:11,397 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:12,098 INFO L129 PetriNetUnfolder]: 78/617 cut-off events. [2021-10-15 19:46:12,098 INFO L130 PetriNetUnfolder]: For 11316/11316 co-relation queries the response was YES. [2021-10-15 19:46:12,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2619 conditions, 617 events. 78/617 cut-off events. For 11316/11316 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1675 event pairs, 0 based on Foata normal form. 4/595 useless extension candidates. Maximal degree in co-relation 2560. Up to 180 conditions per place. [2021-10-15 19:46:12,109 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 55 changer transitions 0/76 dead transitions. [2021-10-15 19:46:12,109 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 76 transitions, 976 flow [2021-10-15 19:46:12,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-15 19:46:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-10-15 19:46:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1068 transitions. [2021-10-15 19:46:12,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6811224489795918 [2021-10-15 19:46:12,113 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 1068 transitions. [2021-10-15 19:46:12,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 1068 transitions. [2021-10-15 19:46:12,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:12,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 1068 transitions. [2021-10-15 19:46:12,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 19.071428571428573) internal successors, (1068), 56 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:12,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 28.0) internal successors, (1596), 57 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:12,126 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 28.0) internal successors, (1596), 57 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:12,126 INFO L186 Difference]: Start difference. First operand has 180 places, 74 transitions, 752 flow. Second operand 56 states and 1068 transitions. [2021-10-15 19:46:12,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 76 transitions, 976 flow [2021-10-15 19:46:12,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 76 transitions, 776 flow, removed 49 selfloop flow, removed 51 redundant places. [2021-10-15 19:46:12,215 INFO L242 Difference]: Finished difference. Result has 186 places, 76 transitions, 778 flow [2021-10-15 19:46:12,216 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=778, PETRI_PLACES=186, PETRI_TRANSITIONS=76} [2021-10-15 19:46:12,216 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 169 predicate places. [2021-10-15 19:46:12,216 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 76 transitions, 778 flow [2021-10-15 19:46:12,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 19.866666666666667) internal successors, (596), 30 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:12,217 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:12,217 INFO L254 CegarLoopForPetriNet]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:12,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:12,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:12,432 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1880079719, now seen corresponding path program 23 times [2021-10-15 19:46:12,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:12,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050609338] [2021-10-15 19:46:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:12,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:12,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:12,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724239461] [2021-10-15 19:46:12,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:46:12,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:12,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:12,453 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:12,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-15 19:46:13,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-10-15 19:46:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-15 19:46:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:14,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:14,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:14,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050609338] [2021-10-15 19:46:14,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:14,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724239461] [2021-10-15 19:46:14,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724239461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:14,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:14,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-10-15 19:46:14,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026787675] [2021-10-15 19:46:14,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-15 19:46:14,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:14,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-15 19:46:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-10-15 19:46:14,287 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:14,288 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 76 transitions, 778 flow. Second operand has 31 states, 31 states have (on average 19.870967741935484) internal successors, (616), 31 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:14,288 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:14,288 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:14,288 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:14,931 INFO L129 PetriNetUnfolder]: 81/640 cut-off events. [2021-10-15 19:46:14,931 INFO L130 PetriNetUnfolder]: For 12185/12185 co-relation queries the response was YES. [2021-10-15 19:46:14,936 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2721 conditions, 640 events. 81/640 cut-off events. For 12185/12185 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1740 event pairs, 0 based on Foata normal form. 4/617 useless extension candidates. Maximal degree in co-relation 2660. Up to 187 conditions per place. [2021-10-15 19:46:14,941 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 57 changer transitions 0/78 dead transitions. [2021-10-15 19:46:14,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 78 transitions, 1010 flow [2021-10-15 19:46:14,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-15 19:46:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-10-15 19:46:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 1106 transitions. [2021-10-15 19:46:14,946 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6810344827586207 [2021-10-15 19:46:14,947 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 1106 transitions. [2021-10-15 19:46:14,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 1106 transitions. [2021-10-15 19:46:14,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:14,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 1106 transitions. [2021-10-15 19:46:14,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 19.06896551724138) internal successors, (1106), 58 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 28.0) internal successors, (1652), 59 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:14,958 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 28.0) internal successors, (1652), 59 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:14,959 INFO L186 Difference]: Start difference. First operand has 186 places, 76 transitions, 778 flow. Second operand 58 states and 1106 transitions. [2021-10-15 19:46:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 78 transitions, 1010 flow [2021-10-15 19:46:15,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 78 transitions, 802 flow, removed 51 selfloop flow, removed 53 redundant places. [2021-10-15 19:46:15,043 INFO L242 Difference]: Finished difference. Result has 192 places, 78 transitions, 804 flow [2021-10-15 19:46:15,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=804, PETRI_PLACES=192, PETRI_TRANSITIONS=78} [2021-10-15 19:46:15,043 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 175 predicate places. [2021-10-15 19:46:15,044 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 78 transitions, 804 flow [2021-10-15 19:46:15,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 19.870967741935484) internal successors, (616), 31 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:15,044 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:15,044 INFO L254 CegarLoopForPetriNet]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:15,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-15 19:46:15,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:15,261 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:15,261 INFO L82 PathProgramCache]: Analyzing trace with hash 177982251, now seen corresponding path program 24 times [2021-10-15 19:46:15,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:15,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248445699] [2021-10-15 19:46:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:15,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:15,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:15,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229332745] [2021-10-15 19:46:15,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:46:15,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:15,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:15,278 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:15,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-15 19:46:16,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-10-15 19:46:16,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-15 19:46:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:17,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:17,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248445699] [2021-10-15 19:46:17,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:17,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229332745] [2021-10-15 19:46:17,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229332745] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:17,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:17,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-10-15 19:46:17,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581587042] [2021-10-15 19:46:17,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-15 19:46:17,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-15 19:46:17,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-10-15 19:46:17,273 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:17,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 78 transitions, 804 flow. Second operand has 32 states, 32 states have (on average 19.875) internal successors, (636), 32 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:17,274 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:17,274 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:17,274 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:17,953 INFO L129 PetriNetUnfolder]: 84/663 cut-off events. [2021-10-15 19:46:17,953 INFO L130 PetriNetUnfolder]: For 13086/13086 co-relation queries the response was YES. [2021-10-15 19:46:17,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2823 conditions, 663 events. 84/663 cut-off events. For 13086/13086 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1805 event pairs, 0 based on Foata normal form. 4/639 useless extension candidates. Maximal degree in co-relation 2760. Up to 194 conditions per place. [2021-10-15 19:46:17,961 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 59 changer transitions 0/80 dead transitions. [2021-10-15 19:46:17,961 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 80 transitions, 1044 flow [2021-10-15 19:46:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-15 19:46:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-10-15 19:46:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1144 transitions. [2021-10-15 19:46:17,963 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.680952380952381 [2021-10-15 19:46:17,964 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 1144 transitions. [2021-10-15 19:46:17,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 1144 transitions. [2021-10-15 19:46:17,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:17,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 1144 transitions. [2021-10-15 19:46:17,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 19.066666666666666) internal successors, (1144), 60 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:17,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 28.0) internal successors, (1708), 61 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:17,972 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 28.0) internal successors, (1708), 61 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:17,972 INFO L186 Difference]: Start difference. First operand has 192 places, 78 transitions, 804 flow. Second operand 60 states and 1144 transitions. [2021-10-15 19:46:17,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 80 transitions, 1044 flow [2021-10-15 19:46:18,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 80 transitions, 828 flow, removed 53 selfloop flow, removed 55 redundant places. [2021-10-15 19:46:18,057 INFO L242 Difference]: Finished difference. Result has 198 places, 80 transitions, 830 flow [2021-10-15 19:46:18,057 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=830, PETRI_PLACES=198, PETRI_TRANSITIONS=80} [2021-10-15 19:46:18,057 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 181 predicate places. [2021-10-15 19:46:18,058 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 80 transitions, 830 flow [2021-10-15 19:46:18,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 19.875) internal successors, (636), 32 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:18,058 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:18,059 INFO L254 CegarLoopForPetriNet]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:18,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:18,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-15 19:46:18,273 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1895248423, now seen corresponding path program 25 times [2021-10-15 19:46:18,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:18,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207145878] [2021-10-15 19:46:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:18,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:18,320 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:18,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348689020] [2021-10-15 19:46:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:46:18,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:18,322 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:18,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-15 19:46:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:46:19,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-15 19:46:19,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:20,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:20,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207145878] [2021-10-15 19:46:20,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:20,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348689020] [2021-10-15 19:46:20,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348689020] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:20,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:20,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-10-15 19:46:20,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125389362] [2021-10-15 19:46:20,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-15 19:46:20,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:20,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-15 19:46:20,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-10-15 19:46:20,141 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:20,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 80 transitions, 830 flow. Second operand has 33 states, 33 states have (on average 19.87878787878788) internal successors, (656), 33 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:20,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:20,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:20,142 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:21,014 INFO L129 PetriNetUnfolder]: 87/686 cut-off events. [2021-10-15 19:46:21,014 INFO L130 PetriNetUnfolder]: For 14019/14019 co-relation queries the response was YES. [2021-10-15 19:46:21,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2925 conditions, 686 events. 87/686 cut-off events. For 14019/14019 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1870 event pairs, 0 based on Foata normal form. 4/661 useless extension candidates. Maximal degree in co-relation 2860. Up to 201 conditions per place. [2021-10-15 19:46:21,024 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 61 changer transitions 0/82 dead transitions. [2021-10-15 19:46:21,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 82 transitions, 1078 flow [2021-10-15 19:46:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-15 19:46:21,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-10-15 19:46:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 1182 transitions. [2021-10-15 19:46:21,027 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6808755760368663 [2021-10-15 19:46:21,027 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 1182 transitions. [2021-10-15 19:46:21,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 1182 transitions. [2021-10-15 19:46:21,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:21,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 1182 transitions. [2021-10-15 19:46:21,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 19.06451612903226) internal successors, (1182), 62 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 28.0) internal successors, (1764), 63 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,034 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 28.0) internal successors, (1764), 63 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,034 INFO L186 Difference]: Start difference. First operand has 198 places, 80 transitions, 830 flow. Second operand 62 states and 1182 transitions. [2021-10-15 19:46:21,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 82 transitions, 1078 flow [2021-10-15 19:46:21,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 82 transitions, 854 flow, removed 55 selfloop flow, removed 57 redundant places. [2021-10-15 19:46:21,136 INFO L242 Difference]: Finished difference. Result has 204 places, 82 transitions, 856 flow [2021-10-15 19:46:21,136 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=856, PETRI_PLACES=204, PETRI_TRANSITIONS=82} [2021-10-15 19:46:21,137 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 187 predicate places. [2021-10-15 19:46:21,137 INFO L470 AbstractCegarLoop]: Abstraction has has 204 places, 82 transitions, 856 flow [2021-10-15 19:46:21,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 19.87878787878788) internal successors, (656), 33 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:21,137 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:21,138 INFO L254 CegarLoopForPetriNet]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:21,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-15 19:46:21,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:21,365 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1498957803, now seen corresponding path program 26 times [2021-10-15 19:46:21,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:21,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986476956] [2021-10-15 19:46:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:21,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:21,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:21,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571463662] [2021-10-15 19:46:21,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:46:21,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:21,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:21,380 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:21,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-15 19:46:22,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:46:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:22,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-15 19:46:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:23,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:23,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:23,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986476956] [2021-10-15 19:46:23,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:23,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571463662] [2021-10-15 19:46:23,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571463662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:23,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:23,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-10-15 19:46:23,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369792705] [2021-10-15 19:46:23,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-15 19:46:23,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-15 19:46:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 19:46:23,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:23,337 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 82 transitions, 856 flow. Second operand has 34 states, 34 states have (on average 19.88235294117647) internal successors, (676), 34 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:23,337 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:23,337 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:23,337 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:24,087 INFO L129 PetriNetUnfolder]: 90/709 cut-off events. [2021-10-15 19:46:24,088 INFO L130 PetriNetUnfolder]: For 14984/14984 co-relation queries the response was YES. [2021-10-15 19:46:24,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3027 conditions, 709 events. 90/709 cut-off events. For 14984/14984 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1935 event pairs, 0 based on Foata normal form. 4/683 useless extension candidates. Maximal degree in co-relation 2960. Up to 208 conditions per place. [2021-10-15 19:46:24,144 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 63 changer transitions 0/84 dead transitions. [2021-10-15 19:46:24,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 84 transitions, 1112 flow [2021-10-15 19:46:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-15 19:46:24,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-15 19:46:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 1220 transitions. [2021-10-15 19:46:24,149 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6808035714285714 [2021-10-15 19:46:24,149 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 1220 transitions. [2021-10-15 19:46:24,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 1220 transitions. [2021-10-15 19:46:24,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:24,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 1220 transitions. [2021-10-15 19:46:24,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 19.0625) internal successors, (1220), 64 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:24,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 28.0) internal successors, (1820), 65 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:24,162 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 28.0) internal successors, (1820), 65 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:24,162 INFO L186 Difference]: Start difference. First operand has 204 places, 82 transitions, 856 flow. Second operand 64 states and 1220 transitions. [2021-10-15 19:46:24,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 84 transitions, 1112 flow [2021-10-15 19:46:24,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 84 transitions, 880 flow, removed 57 selfloop flow, removed 59 redundant places. [2021-10-15 19:46:24,268 INFO L242 Difference]: Finished difference. Result has 210 places, 84 transitions, 882 flow [2021-10-15 19:46:24,268 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=882, PETRI_PLACES=210, PETRI_TRANSITIONS=84} [2021-10-15 19:46:24,268 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 193 predicate places. [2021-10-15 19:46:24,269 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 84 transitions, 882 flow [2021-10-15 19:46:24,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 19.88235294117647) internal successors, (676), 34 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:24,269 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:24,269 INFO L254 CegarLoopForPetriNet]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:24,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:24,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-15 19:46:24,470 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:24,470 INFO L82 PathProgramCache]: Analyzing trace with hash -161724135, now seen corresponding path program 27 times [2021-10-15 19:46:24,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:24,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308098111] [2021-10-15 19:46:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:24,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:24,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:24,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320871051] [2021-10-15 19:46:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:46:24,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:24,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:24,489 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:24,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-15 19:46:25,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2021-10-15 19:46:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-15 19:46:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:26,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308098111] [2021-10-15 19:46:26,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:26,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320871051] [2021-10-15 19:46:26,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320871051] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:26,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:26,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-10-15 19:46:26,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735363989] [2021-10-15 19:46:26,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-15 19:46:26,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-15 19:46:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-10-15 19:46:26,752 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:26,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 84 transitions, 882 flow. Second operand has 35 states, 35 states have (on average 19.885714285714286) internal successors, (696), 35 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 19:46:26,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:26,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:26,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:27,580 INFO L129 PetriNetUnfolder]: 93/732 cut-off events. [2021-10-15 19:46:27,580 INFO L130 PetriNetUnfolder]: For 15981/15981 co-relation queries the response was YES. [2021-10-15 19:46:27,588 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3129 conditions, 732 events. 93/732 cut-off events. For 15981/15981 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2000 event pairs, 0 based on Foata normal form. 4/705 useless extension candidates. Maximal degree in co-relation 3060. Up to 215 conditions per place. [2021-10-15 19:46:27,605 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 65 changer transitions 0/86 dead transitions. [2021-10-15 19:46:27,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 86 transitions, 1146 flow [2021-10-15 19:46:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-15 19:46:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-15 19:46:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 1258 transitions. [2021-10-15 19:46:27,609 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6807359307359307 [2021-10-15 19:46:27,609 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 1258 transitions. [2021-10-15 19:46:27,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 1258 transitions. [2021-10-15 19:46:27,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:27,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 1258 transitions. [2021-10-15 19:46:27,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 19.060606060606062) internal successors, (1258), 66 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:27,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 28.0) internal successors, (1876), 67 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:27,618 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 28.0) internal successors, (1876), 67 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:27,618 INFO L186 Difference]: Start difference. First operand has 210 places, 84 transitions, 882 flow. Second operand 66 states and 1258 transitions. [2021-10-15 19:46:27,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 86 transitions, 1146 flow [2021-10-15 19:46:27,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 86 transitions, 906 flow, removed 59 selfloop flow, removed 61 redundant places. [2021-10-15 19:46:27,746 INFO L242 Difference]: Finished difference. Result has 216 places, 86 transitions, 908 flow [2021-10-15 19:46:27,747 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=908, PETRI_PLACES=216, PETRI_TRANSITIONS=86} [2021-10-15 19:46:27,749 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 199 predicate places. [2021-10-15 19:46:27,749 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 86 transitions, 908 flow [2021-10-15 19:46:27,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 19.885714285714286) internal successors, (696), 35 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 19:46:27,749 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:27,750 INFO L254 CegarLoopForPetriNet]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:27,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-15 19:46:27,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-15 19:46:27,969 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:27,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:27,969 INFO L82 PathProgramCache]: Analyzing trace with hash -550513493, now seen corresponding path program 28 times [2021-10-15 19:46:27,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:27,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773389721] [2021-10-15 19:46:27,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:27,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:28,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:28,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323575862] [2021-10-15 19:46:28,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:46:28,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:28,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:28,008 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:28,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-15 19:46:29,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:46:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-15 19:46:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:30,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:30,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773389721] [2021-10-15 19:46:30,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:30,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323575862] [2021-10-15 19:46:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323575862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:30,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:30,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-10-15 19:46:30,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843871671] [2021-10-15 19:46:30,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-15 19:46:30,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-15 19:46:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-10-15 19:46:30,329 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:30,329 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 86 transitions, 908 flow. Second operand has 36 states, 36 states have (on average 19.88888888888889) internal successors, (716), 36 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:30,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:30,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:30,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:31,196 INFO L129 PetriNetUnfolder]: 96/755 cut-off events. [2021-10-15 19:46:31,197 INFO L130 PetriNetUnfolder]: For 17010/17010 co-relation queries the response was YES. [2021-10-15 19:46:31,201 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 755 events. 96/755 cut-off events. For 17010/17010 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2065 event pairs, 0 based on Foata normal form. 4/727 useless extension candidates. Maximal degree in co-relation 3160. Up to 222 conditions per place. [2021-10-15 19:46:31,204 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 67 changer transitions 0/88 dead transitions. [2021-10-15 19:46:31,204 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 88 transitions, 1180 flow [2021-10-15 19:46:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-15 19:46:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-10-15 19:46:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 1296 transitions. [2021-10-15 19:46:31,207 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.680672268907563 [2021-10-15 19:46:31,208 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 1296 transitions. [2021-10-15 19:46:31,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 1296 transitions. [2021-10-15 19:46:31,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:31,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 1296 transitions. [2021-10-15 19:46:31,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 19.058823529411764) internal successors, (1296), 68 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:31,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 28.0) internal successors, (1932), 69 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:31,217 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 28.0) internal successors, (1932), 69 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:31,217 INFO L186 Difference]: Start difference. First operand has 216 places, 86 transitions, 908 flow. Second operand 68 states and 1296 transitions. [2021-10-15 19:46:31,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 88 transitions, 1180 flow [2021-10-15 19:46:31,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 88 transitions, 932 flow, removed 61 selfloop flow, removed 63 redundant places. [2021-10-15 19:46:31,356 INFO L242 Difference]: Finished difference. Result has 222 places, 88 transitions, 934 flow [2021-10-15 19:46:31,357 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=934, PETRI_PLACES=222, PETRI_TRANSITIONS=88} [2021-10-15 19:46:31,357 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 205 predicate places. [2021-10-15 19:46:31,357 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 88 transitions, 934 flow [2021-10-15 19:46:31,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 19.88888888888889) internal successors, (716), 36 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:31,358 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:31,358 INFO L254 CegarLoopForPetriNet]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:31,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:31,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:31,577 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:31,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:31,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1392593831, now seen corresponding path program 29 times [2021-10-15 19:46:31,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:31,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64648352] [2021-10-15 19:46:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:31,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:31,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:31,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985276011] [2021-10-15 19:46:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:46:31,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:31,602 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:31,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-15 19:46:32,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-10-15 19:46:32,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:32,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-15 19:46:32,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:34,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:34,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64648352] [2021-10-15 19:46:34,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:34,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985276011] [2021-10-15 19:46:34,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985276011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:34,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:34,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-10-15 19:46:34,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111657118] [2021-10-15 19:46:34,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-15 19:46:34,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-15 19:46:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-10-15 19:46:34,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:34,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 88 transitions, 934 flow. Second operand has 37 states, 37 states have (on average 19.89189189189189) internal successors, (736), 37 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:34,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:34,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:34,190 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:35,121 INFO L129 PetriNetUnfolder]: 99/778 cut-off events. [2021-10-15 19:46:35,121 INFO L130 PetriNetUnfolder]: For 18071/18071 co-relation queries the response was YES. [2021-10-15 19:46:35,126 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3333 conditions, 778 events. 99/778 cut-off events. For 18071/18071 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2130 event pairs, 0 based on Foata normal form. 4/749 useless extension candidates. Maximal degree in co-relation 3260. Up to 229 conditions per place. [2021-10-15 19:46:35,128 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 69 changer transitions 0/90 dead transitions. [2021-10-15 19:46:35,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 90 transitions, 1214 flow [2021-10-15 19:46:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-15 19:46:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-10-15 19:46:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1334 transitions. [2021-10-15 19:46:35,131 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6806122448979591 [2021-10-15 19:46:35,131 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 1334 transitions. [2021-10-15 19:46:35,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 1334 transitions. [2021-10-15 19:46:35,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:35,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 1334 transitions. [2021-10-15 19:46:35,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 19.057142857142857) internal successors, (1334), 70 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:35,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 28.0) internal successors, (1988), 71 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:35,140 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 28.0) internal successors, (1988), 71 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:35,140 INFO L186 Difference]: Start difference. First operand has 222 places, 88 transitions, 934 flow. Second operand 70 states and 1334 transitions. [2021-10-15 19:46:35,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 90 transitions, 1214 flow [2021-10-15 19:46:35,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 90 transitions, 958 flow, removed 63 selfloop flow, removed 65 redundant places. [2021-10-15 19:46:35,251 INFO L242 Difference]: Finished difference. Result has 228 places, 90 transitions, 960 flow [2021-10-15 19:46:35,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=960, PETRI_PLACES=228, PETRI_TRANSITIONS=90} [2021-10-15 19:46:35,252 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 211 predicate places. [2021-10-15 19:46:35,252 INFO L470 AbstractCegarLoop]: Abstraction has has 228 places, 90 transitions, 960 flow [2021-10-15 19:46:35,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 19.89189189189189) internal successors, (736), 37 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:35,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:35,253 INFO L254 CegarLoopForPetriNet]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:35,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-15 19:46:35,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:35,454 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 26112363, now seen corresponding path program 30 times [2021-10-15 19:46:35,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:35,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721369780] [2021-10-15 19:46:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:35,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:35,489 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:35,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068230235] [2021-10-15 19:46:35,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:46:35,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:35,492 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:35,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-15 19:46:36,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-10-15 19:46:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-15 19:46:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:38,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:38,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721369780] [2021-10-15 19:46:38,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:38,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068230235] [2021-10-15 19:46:38,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068230235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:38,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:38,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-10-15 19:46:38,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847815129] [2021-10-15 19:46:38,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-15 19:46:38,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:38,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-15 19:46:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-10-15 19:46:38,076 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:38,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 90 transitions, 960 flow. Second operand has 38 states, 38 states have (on average 19.894736842105264) internal successors, (756), 38 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:38,077 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:38,077 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:38,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:38,961 INFO L129 PetriNetUnfolder]: 102/801 cut-off events. [2021-10-15 19:46:38,961 INFO L130 PetriNetUnfolder]: For 19164/19164 co-relation queries the response was YES. [2021-10-15 19:46:38,965 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3435 conditions, 801 events. 102/801 cut-off events. For 19164/19164 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2195 event pairs, 0 based on Foata normal form. 4/771 useless extension candidates. Maximal degree in co-relation 3360. Up to 236 conditions per place. [2021-10-15 19:46:38,967 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 71 changer transitions 0/92 dead transitions. [2021-10-15 19:46:38,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 92 transitions, 1248 flow [2021-10-15 19:46:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-15 19:46:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-10-15 19:46:38,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 1372 transitions. [2021-10-15 19:46:38,969 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2021-10-15 19:46:38,969 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 1372 transitions. [2021-10-15 19:46:38,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 1372 transitions. [2021-10-15 19:46:38,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:38,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 1372 transitions. [2021-10-15 19:46:38,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 19.055555555555557) internal successors, (1372), 72 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:38,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 28.0) internal successors, (2044), 73 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:38,976 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 28.0) internal successors, (2044), 73 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:38,976 INFO L186 Difference]: Start difference. First operand has 228 places, 90 transitions, 960 flow. Second operand 72 states and 1372 transitions. [2021-10-15 19:46:38,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 92 transitions, 1248 flow [2021-10-15 19:46:39,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 92 transitions, 984 flow, removed 65 selfloop flow, removed 67 redundant places. [2021-10-15 19:46:39,070 INFO L242 Difference]: Finished difference. Result has 234 places, 92 transitions, 986 flow [2021-10-15 19:46:39,070 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=986, PETRI_PLACES=234, PETRI_TRANSITIONS=92} [2021-10-15 19:46:39,070 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 217 predicate places. [2021-10-15 19:46:39,071 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 92 transitions, 986 flow [2021-10-15 19:46:39,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 19.894736842105264) internal successors, (756), 38 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:39,071 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:39,071 INFO L254 CegarLoopForPetriNet]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:39,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:39,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-15 19:46:39,273 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:39,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:39,274 INFO L82 PathProgramCache]: Analyzing trace with hash -788263015, now seen corresponding path program 31 times [2021-10-15 19:46:39,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:39,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963216229] [2021-10-15 19:46:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:39,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:39,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:39,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554627510] [2021-10-15 19:46:39,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:46:39,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:39,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:39,291 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:39,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-15 19:46:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:46:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-15 19:46:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:41,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:41,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963216229] [2021-10-15 19:46:41,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:41,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554627510] [2021-10-15 19:46:41,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554627510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:41,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:41,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-10-15 19:46:41,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252346922] [2021-10-15 19:46:41,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-15 19:46:41,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-15 19:46:41,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-10-15 19:46:41,793 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:41,793 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 92 transitions, 986 flow. Second operand has 39 states, 39 states have (on average 19.897435897435898) internal successors, (776), 39 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:41,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:41,793 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:41,793 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:42,851 INFO L129 PetriNetUnfolder]: 105/824 cut-off events. [2021-10-15 19:46:42,852 INFO L130 PetriNetUnfolder]: For 20289/20289 co-relation queries the response was YES. [2021-10-15 19:46:42,860 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3537 conditions, 824 events. 105/824 cut-off events. For 20289/20289 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2260 event pairs, 0 based on Foata normal form. 4/793 useless extension candidates. Maximal degree in co-relation 3460. Up to 243 conditions per place. [2021-10-15 19:46:42,863 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 73 changer transitions 0/94 dead transitions. [2021-10-15 19:46:42,864 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 94 transitions, 1282 flow [2021-10-15 19:46:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-15 19:46:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-10-15 19:46:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 1410 transitions. [2021-10-15 19:46:42,868 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6805019305019305 [2021-10-15 19:46:42,869 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 1410 transitions. [2021-10-15 19:46:42,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 1410 transitions. [2021-10-15 19:46:42,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:42,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 1410 transitions. [2021-10-15 19:46:42,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 19.054054054054053) internal successors, (1410), 74 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:42,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 28.0) internal successors, (2100), 75 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:42,879 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 28.0) internal successors, (2100), 75 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:42,879 INFO L186 Difference]: Start difference. First operand has 234 places, 92 transitions, 986 flow. Second operand 74 states and 1410 transitions. [2021-10-15 19:46:42,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 94 transitions, 1282 flow [2021-10-15 19:46:43,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 94 transitions, 1010 flow, removed 67 selfloop flow, removed 69 redundant places. [2021-10-15 19:46:43,047 INFO L242 Difference]: Finished difference. Result has 240 places, 94 transitions, 1012 flow [2021-10-15 19:46:43,047 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=1012, PETRI_PLACES=240, PETRI_TRANSITIONS=94} [2021-10-15 19:46:43,048 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 223 predicate places. [2021-10-15 19:46:43,048 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 94 transitions, 1012 flow [2021-10-15 19:46:43,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 19.897435897435898) internal successors, (776), 39 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:43,049 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:43,049 INFO L254 CegarLoopForPetriNet]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:43,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-15 19:46:43,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:43,265 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1323310635, now seen corresponding path program 32 times [2021-10-15 19:46:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:43,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236486159] [2021-10-15 19:46:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:43,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:43,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:43,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658521815] [2021-10-15 19:46:43,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:46:43,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:43,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:43,292 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:43,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-15 19:46:44,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:46:44,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-15 19:46:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:45,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:45,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236486159] [2021-10-15 19:46:45,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:45,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658521815] [2021-10-15 19:46:45,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658521815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:45,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:45,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-10-15 19:46:45,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183123146] [2021-10-15 19:46:45,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-15 19:46:45,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:45,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-15 19:46:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-10-15 19:46:45,976 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:45,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 94 transitions, 1012 flow. Second operand has 40 states, 40 states have (on average 19.9) internal successors, (796), 40 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:45,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:45,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:45,977 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:47,013 INFO L129 PetriNetUnfolder]: 108/847 cut-off events. [2021-10-15 19:46:47,013 INFO L130 PetriNetUnfolder]: For 21446/21446 co-relation queries the response was YES. [2021-10-15 19:46:47,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 847 events. 108/847 cut-off events. For 21446/21446 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2325 event pairs, 0 based on Foata normal form. 4/815 useless extension candidates. Maximal degree in co-relation 3560. Up to 250 conditions per place. [2021-10-15 19:46:47,027 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 75 changer transitions 0/96 dead transitions. [2021-10-15 19:46:47,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 96 transitions, 1316 flow [2021-10-15 19:46:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-15 19:46:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-10-15 19:46:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 1448 transitions. [2021-10-15 19:46:47,031 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6804511278195489 [2021-10-15 19:46:47,031 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 1448 transitions. [2021-10-15 19:46:47,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 1448 transitions. [2021-10-15 19:46:47,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:47,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 1448 transitions. [2021-10-15 19:46:47,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 19.05263157894737) internal successors, (1448), 76 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:47,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 28.0) internal successors, (2156), 77 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:47,040 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 28.0) internal successors, (2156), 77 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:47,040 INFO L186 Difference]: Start difference. First operand has 240 places, 94 transitions, 1012 flow. Second operand 76 states and 1448 transitions. [2021-10-15 19:46:47,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 96 transitions, 1316 flow [2021-10-15 19:46:47,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 96 transitions, 1036 flow, removed 69 selfloop flow, removed 71 redundant places. [2021-10-15 19:46:47,222 INFO L242 Difference]: Finished difference. Result has 246 places, 96 transitions, 1038 flow [2021-10-15 19:46:47,223 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=1038, PETRI_PLACES=246, PETRI_TRANSITIONS=96} [2021-10-15 19:46:47,223 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 229 predicate places. [2021-10-15 19:46:47,223 INFO L470 AbstractCegarLoop]: Abstraction has has 246 places, 96 transitions, 1038 flow [2021-10-15 19:46:47,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 19.9) internal successors, (796), 40 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:47,224 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:47,224 INFO L254 CegarLoopForPetriNet]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:47,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:47,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:47,438 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash -142583079, now seen corresponding path program 33 times [2021-10-15 19:46:47,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:47,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837885303] [2021-10-15 19:46:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:47,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:47,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:47,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23104772] [2021-10-15 19:46:47,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:46:47,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:47,482 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:47,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-15 19:46:49,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-10-15 19:46:49,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-15 19:46:49,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:50,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:50,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837885303] [2021-10-15 19:46:50,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:50,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23104772] [2021-10-15 19:46:50,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23104772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:50,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:50,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-10-15 19:46:50,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418796405] [2021-10-15 19:46:50,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-15 19:46:50,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-15 19:46:50,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-10-15 19:46:50,414 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:50,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 96 transitions, 1038 flow. Second operand has 41 states, 41 states have (on average 19.902439024390244) internal successors, (816), 41 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:50,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:50,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:50,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:51,507 INFO L129 PetriNetUnfolder]: 111/870 cut-off events. [2021-10-15 19:46:51,507 INFO L130 PetriNetUnfolder]: For 22635/22635 co-relation queries the response was YES. [2021-10-15 19:46:51,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3741 conditions, 870 events. 111/870 cut-off events. For 22635/22635 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2390 event pairs, 0 based on Foata normal form. 4/837 useless extension candidates. Maximal degree in co-relation 3660. Up to 257 conditions per place. [2021-10-15 19:46:51,516 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 77 changer transitions 0/98 dead transitions. [2021-10-15 19:46:51,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 98 transitions, 1350 flow [2021-10-15 19:46:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-15 19:46:51,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-10-15 19:46:51,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 1486 transitions. [2021-10-15 19:46:51,519 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6804029304029304 [2021-10-15 19:46:51,519 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 1486 transitions. [2021-10-15 19:46:51,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 1486 transitions. [2021-10-15 19:46:51,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:51,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 1486 transitions. [2021-10-15 19:46:51,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 19.05128205128205) internal successors, (1486), 78 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:51,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 28.0) internal successors, (2212), 79 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:51,524 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 28.0) internal successors, (2212), 79 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:51,524 INFO L186 Difference]: Start difference. First operand has 246 places, 96 transitions, 1038 flow. Second operand 78 states and 1486 transitions. [2021-10-15 19:46:51,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 98 transitions, 1350 flow [2021-10-15 19:46:51,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 98 transitions, 1062 flow, removed 71 selfloop flow, removed 73 redundant places. [2021-10-15 19:46:51,719 INFO L242 Difference]: Finished difference. Result has 252 places, 98 transitions, 1064 flow [2021-10-15 19:46:51,719 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=1064, PETRI_PLACES=252, PETRI_TRANSITIONS=98} [2021-10-15 19:46:51,719 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 235 predicate places. [2021-10-15 19:46:51,719 INFO L470 AbstractCegarLoop]: Abstraction has has 252 places, 98 transitions, 1064 flow [2021-10-15 19:46:51,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 19.902439024390244) internal successors, (816), 41 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:51,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:51,720 INFO L254 CegarLoopForPetriNet]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:51,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:51,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-15 19:46:51,949 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1049680619, now seen corresponding path program 34 times [2021-10-15 19:46:51,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:51,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177674140] [2021-10-15 19:46:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:51,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:51,985 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:51,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170000066] [2021-10-15 19:46:51,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:46:51,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:51,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:51,987 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:52,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-15 19:46:54,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:46:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:54,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-15 19:46:54,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:46:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:46:55,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:46:55,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177674140] [2021-10-15 19:46:55,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:46:55,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170000066] [2021-10-15 19:46:55,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170000066] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:46:55,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:46:55,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-10-15 19:46:55,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920731556] [2021-10-15 19:46:55,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-15 19:46:55,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:46:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-15 19:46:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-10-15 19:46:55,264 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:46:55,265 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 98 transitions, 1064 flow. Second operand has 42 states, 42 states have (on average 19.904761904761905) internal successors, (836), 42 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:55,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:46:55,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:46:55,265 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:46:56,379 INFO L129 PetriNetUnfolder]: 114/893 cut-off events. [2021-10-15 19:46:56,379 INFO L130 PetriNetUnfolder]: For 23856/23856 co-relation queries the response was YES. [2021-10-15 19:46:56,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3843 conditions, 893 events. 114/893 cut-off events. For 23856/23856 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2455 event pairs, 0 based on Foata normal form. 4/859 useless extension candidates. Maximal degree in co-relation 3760. Up to 264 conditions per place. [2021-10-15 19:46:56,394 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 79 changer transitions 0/100 dead transitions. [2021-10-15 19:46:56,395 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 100 transitions, 1384 flow [2021-10-15 19:46:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-15 19:46:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-10-15 19:46:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 1524 transitions. [2021-10-15 19:46:56,399 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6803571428571429 [2021-10-15 19:46:56,399 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 1524 transitions. [2021-10-15 19:46:56,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 1524 transitions. [2021-10-15 19:46:56,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:46:56,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 1524 transitions. [2021-10-15 19:46:56,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 19.05) internal successors, (1524), 80 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:56,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 28.0) internal successors, (2268), 81 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:56,411 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 28.0) internal successors, (2268), 81 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:56,411 INFO L186 Difference]: Start difference. First operand has 252 places, 98 transitions, 1064 flow. Second operand 80 states and 1524 transitions. [2021-10-15 19:46:56,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 100 transitions, 1384 flow [2021-10-15 19:46:56,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 100 transitions, 1088 flow, removed 73 selfloop flow, removed 75 redundant places. [2021-10-15 19:46:56,643 INFO L242 Difference]: Finished difference. Result has 258 places, 100 transitions, 1090 flow [2021-10-15 19:46:56,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=1090, PETRI_PLACES=258, PETRI_TRANSITIONS=100} [2021-10-15 19:46:56,644 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 241 predicate places. [2021-10-15 19:46:56,644 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 100 transitions, 1090 flow [2021-10-15 19:46:56,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 19.904761904761905) internal successors, (836), 42 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:46:56,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:46:56,645 INFO L254 CegarLoopForPetriNet]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:46:56,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-15 19:46:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:56,873 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:46:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:46:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1820825113, now seen corresponding path program 35 times [2021-10-15 19:46:56,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:46:56,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742864799] [2021-10-15 19:46:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:46:56,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:46:56,913 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:46:56,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063770550] [2021-10-15 19:46:56,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:46:56,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:46:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:46:56,915 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:46:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-15 19:46:58,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-10-15 19:46:58,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:46:58,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-15 19:46:58,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:00,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:00,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742864799] [2021-10-15 19:47:00,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:00,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063770550] [2021-10-15 19:47:00,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063770550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:00,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:00,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-10-15 19:47:00,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226261738] [2021-10-15 19:47:00,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-15 19:47:00,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-15 19:47:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-10-15 19:47:00,317 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:00,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 100 transitions, 1090 flow. Second operand has 43 states, 43 states have (on average 19.906976744186046) internal successors, (856), 43 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:00,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:00,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:00,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:01,650 INFO L129 PetriNetUnfolder]: 117/916 cut-off events. [2021-10-15 19:47:01,651 INFO L130 PetriNetUnfolder]: For 25109/25109 co-relation queries the response was YES. [2021-10-15 19:47:01,658 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 916 events. 117/916 cut-off events. For 25109/25109 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2520 event pairs, 0 based on Foata normal form. 4/881 useless extension candidates. Maximal degree in co-relation 3860. Up to 271 conditions per place. [2021-10-15 19:47:01,660 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 81 changer transitions 0/102 dead transitions. [2021-10-15 19:47:01,660 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 102 transitions, 1418 flow [2021-10-15 19:47:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-15 19:47:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-10-15 19:47:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 1562 transitions. [2021-10-15 19:47:01,662 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6803135888501742 [2021-10-15 19:47:01,663 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 1562 transitions. [2021-10-15 19:47:01,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 1562 transitions. [2021-10-15 19:47:01,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:01,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 1562 transitions. [2021-10-15 19:47:01,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 19.048780487804876) internal successors, (1562), 82 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:01,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 28.0) internal successors, (2324), 83 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:01,668 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 28.0) internal successors, (2324), 83 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:01,668 INFO L186 Difference]: Start difference. First operand has 258 places, 100 transitions, 1090 flow. Second operand 82 states and 1562 transitions. [2021-10-15 19:47:01,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 102 transitions, 1418 flow [2021-10-15 19:47:01,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 102 transitions, 1114 flow, removed 75 selfloop flow, removed 77 redundant places. [2021-10-15 19:47:01,858 INFO L242 Difference]: Finished difference. Result has 264 places, 102 transitions, 1116 flow [2021-10-15 19:47:01,858 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=1116, PETRI_PLACES=264, PETRI_TRANSITIONS=102} [2021-10-15 19:47:01,859 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 247 predicate places. [2021-10-15 19:47:01,859 INFO L470 AbstractCegarLoop]: Abstraction has has 264 places, 102 transitions, 1116 flow [2021-10-15 19:47:01,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 19.906976744186046) internal successors, (856), 43 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:01,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:01,860 INFO L254 CegarLoopForPetriNet]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:01,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:02,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:02,060 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:02,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -250828885, now seen corresponding path program 36 times [2021-10-15 19:47:02,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:02,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849087861] [2021-10-15 19:47:02,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:02,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:02,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:02,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413636707] [2021-10-15 19:47:02,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:47:02,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:02,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:02,085 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:02,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-15 19:47:04,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-10-15 19:47:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:04,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-15 19:47:04,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:05,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849087861] [2021-10-15 19:47:05,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:05,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413636707] [2021-10-15 19:47:05,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413636707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:05,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:05,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-10-15 19:47:05,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873816907] [2021-10-15 19:47:05,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-15 19:47:05,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:05,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-15 19:47:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-10-15 19:47:05,466 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:05,467 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 102 transitions, 1116 flow. Second operand has 44 states, 44 states have (on average 19.90909090909091) internal successors, (876), 44 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:05,467 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:05,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:05,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:06,676 INFO L129 PetriNetUnfolder]: 120/939 cut-off events. [2021-10-15 19:47:06,676 INFO L130 PetriNetUnfolder]: For 26394/26394 co-relation queries the response was YES. [2021-10-15 19:47:06,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 939 events. 120/939 cut-off events. For 26394/26394 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2585 event pairs, 0 based on Foata normal form. 4/903 useless extension candidates. Maximal degree in co-relation 3960. Up to 278 conditions per place. [2021-10-15 19:47:06,691 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 83 changer transitions 0/104 dead transitions. [2021-10-15 19:47:06,692 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 104 transitions, 1452 flow [2021-10-15 19:47:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-15 19:47:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-10-15 19:47:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 1600 transitions. [2021-10-15 19:47:06,695 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6802721088435374 [2021-10-15 19:47:06,696 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 1600 transitions. [2021-10-15 19:47:06,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 1600 transitions. [2021-10-15 19:47:06,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:06,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 1600 transitions. [2021-10-15 19:47:06,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 19.047619047619047) internal successors, (1600), 84 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:06,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 28.0) internal successors, (2380), 85 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:06,704 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 28.0) internal successors, (2380), 85 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:06,705 INFO L186 Difference]: Start difference. First operand has 264 places, 102 transitions, 1116 flow. Second operand 84 states and 1600 transitions. [2021-10-15 19:47:06,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 104 transitions, 1452 flow [2021-10-15 19:47:06,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 104 transitions, 1140 flow, removed 77 selfloop flow, removed 79 redundant places. [2021-10-15 19:47:06,951 INFO L242 Difference]: Finished difference. Result has 270 places, 104 transitions, 1142 flow [2021-10-15 19:47:06,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=1142, PETRI_PLACES=270, PETRI_TRANSITIONS=104} [2021-10-15 19:47:06,952 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 253 predicate places. [2021-10-15 19:47:06,952 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 104 transitions, 1142 flow [2021-10-15 19:47:06,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 19.90909090909091) internal successors, (876), 44 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:06,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:06,952 INFO L254 CegarLoopForPetriNet]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:06,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:07,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-15 19:47:07,153 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:07,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1932378457, now seen corresponding path program 37 times [2021-10-15 19:47:07,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:07,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619336622] [2021-10-15 19:47:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:07,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:07,174 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:07,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1015992518] [2021-10-15 19:47:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:47:07,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:07,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:07,178 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:07,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-15 19:47:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:08,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-15 19:47:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:09,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:09,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619336622] [2021-10-15 19:47:09,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:09,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015992518] [2021-10-15 19:47:09,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015992518] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:09,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:09,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-10-15 19:47:09,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507235057] [2021-10-15 19:47:09,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-15 19:47:09,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-15 19:47:09,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-10-15 19:47:09,935 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:09,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 104 transitions, 1142 flow. Second operand has 45 states, 45 states have (on average 19.91111111111111) internal successors, (896), 45 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:09,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:09,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:09,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:10,937 INFO L129 PetriNetUnfolder]: 123/962 cut-off events. [2021-10-15 19:47:10,937 INFO L130 PetriNetUnfolder]: For 27711/27711 co-relation queries the response was YES. [2021-10-15 19:47:10,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4149 conditions, 962 events. 123/962 cut-off events. For 27711/27711 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2650 event pairs, 0 based on Foata normal form. 4/925 useless extension candidates. Maximal degree in co-relation 4060. Up to 285 conditions per place. [2021-10-15 19:47:10,944 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 85 changer transitions 0/106 dead transitions. [2021-10-15 19:47:10,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 106 transitions, 1486 flow [2021-10-15 19:47:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-15 19:47:10,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-10-15 19:47:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 1638 transitions. [2021-10-15 19:47:10,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6802325581395349 [2021-10-15 19:47:10,959 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 1638 transitions. [2021-10-15 19:47:10,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 1638 transitions. [2021-10-15 19:47:10,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:10,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 1638 transitions. [2021-10-15 19:47:10,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 19.046511627906977) internal successors, (1638), 86 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 28.0) internal successors, (2436), 87 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,966 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 28.0) internal successors, (2436), 87 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:10,967 INFO L186 Difference]: Start difference. First operand has 270 places, 104 transitions, 1142 flow. Second operand 86 states and 1638 transitions. [2021-10-15 19:47:10,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 106 transitions, 1486 flow [2021-10-15 19:47:11,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 106 transitions, 1166 flow, removed 79 selfloop flow, removed 81 redundant places. [2021-10-15 19:47:11,174 INFO L242 Difference]: Finished difference. Result has 276 places, 106 transitions, 1168 flow [2021-10-15 19:47:11,174 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=1168, PETRI_PLACES=276, PETRI_TRANSITIONS=106} [2021-10-15 19:47:11,175 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 259 predicate places. [2021-10-15 19:47:11,175 INFO L470 AbstractCegarLoop]: Abstraction has has 276 places, 106 transitions, 1168 flow [2021-10-15 19:47:11,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 19.91111111111111) internal successors, (896), 45 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:11,175 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:11,176 INFO L254 CegarLoopForPetriNet]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:11,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:11,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:11,400 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -272661397, now seen corresponding path program 38 times [2021-10-15 19:47:11,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:11,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631584296] [2021-10-15 19:47:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:11,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:11,422 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:11,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508129902] [2021-10-15 19:47:11,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:47:11,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:11,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:11,424 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:11,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-15 19:47:12,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:47:12,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-15 19:47:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:14,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:14,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631584296] [2021-10-15 19:47:14,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:14,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508129902] [2021-10-15 19:47:14,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508129902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:14,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:14,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-10-15 19:47:14,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244835334] [2021-10-15 19:47:14,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-15 19:47:14,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:14,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-15 19:47:14,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-10-15 19:47:14,428 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:14,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 106 transitions, 1168 flow. Second operand has 46 states, 46 states have (on average 19.91304347826087) internal successors, (916), 46 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:14,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:14,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:14,428 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:15,535 INFO L129 PetriNetUnfolder]: 126/985 cut-off events. [2021-10-15 19:47:15,535 INFO L130 PetriNetUnfolder]: For 29060/29060 co-relation queries the response was YES. [2021-10-15 19:47:15,542 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4251 conditions, 985 events. 126/985 cut-off events. For 29060/29060 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2715 event pairs, 0 based on Foata normal form. 4/947 useless extension candidates. Maximal degree in co-relation 4160. Up to 292 conditions per place. [2021-10-15 19:47:15,547 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 87 changer transitions 0/108 dead transitions. [2021-10-15 19:47:15,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 108 transitions, 1520 flow [2021-10-15 19:47:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-15 19:47:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-10-15 19:47:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 1676 transitions. [2021-10-15 19:47:15,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6801948051948052 [2021-10-15 19:47:15,550 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 1676 transitions. [2021-10-15 19:47:15,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 1676 transitions. [2021-10-15 19:47:15,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:15,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 1676 transitions. [2021-10-15 19:47:15,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 19.045454545454547) internal successors, (1676), 88 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:15,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 28.0) internal successors, (2492), 89 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:15,558 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 28.0) internal successors, (2492), 89 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:15,559 INFO L186 Difference]: Start difference. First operand has 276 places, 106 transitions, 1168 flow. Second operand 88 states and 1676 transitions. [2021-10-15 19:47:15,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 108 transitions, 1520 flow [2021-10-15 19:47:15,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 108 transitions, 1192 flow, removed 81 selfloop flow, removed 83 redundant places. [2021-10-15 19:47:15,768 INFO L242 Difference]: Finished difference. Result has 282 places, 108 transitions, 1194 flow [2021-10-15 19:47:15,768 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=1194, PETRI_PLACES=282, PETRI_TRANSITIONS=108} [2021-10-15 19:47:15,768 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 265 predicate places. [2021-10-15 19:47:15,768 INFO L470 AbstractCegarLoop]: Abstraction has has 282 places, 108 transitions, 1194 flow [2021-10-15 19:47:15,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 19.91304347826087) internal successors, (916), 46 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:15,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:15,769 INFO L254 CegarLoopForPetriNet]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:15,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-15 19:47:15,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-15 19:47:15,969 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:15,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759271, now seen corresponding path program 39 times [2021-10-15 19:47:15,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:15,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846000507] [2021-10-15 19:47:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:15,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:15,988 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:15,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965157366] [2021-10-15 19:47:15,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:47:15,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:15,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:15,991 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:16,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-15 19:47:17,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2021-10-15 19:47:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-15 19:47:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:19,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:19,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846000507] [2021-10-15 19:47:19,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:19,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965157366] [2021-10-15 19:47:19,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965157366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:19,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:19,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-10-15 19:47:19,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515114072] [2021-10-15 19:47:19,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-15 19:47:19,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:19,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-15 19:47:19,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-10-15 19:47:19,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:19,067 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 108 transitions, 1194 flow. Second operand has 47 states, 47 states have (on average 19.914893617021278) internal successors, (936), 47 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:19,067 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:19,067 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:19,067 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:20,119 INFO L129 PetriNetUnfolder]: 129/1008 cut-off events. [2021-10-15 19:47:20,120 INFO L130 PetriNetUnfolder]: For 30441/30441 co-relation queries the response was YES. [2021-10-15 19:47:20,131 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4353 conditions, 1008 events. 129/1008 cut-off events. For 30441/30441 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2780 event pairs, 0 based on Foata normal form. 4/969 useless extension candidates. Maximal degree in co-relation 4260. Up to 299 conditions per place. [2021-10-15 19:47:20,181 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 89 changer transitions 0/110 dead transitions. [2021-10-15 19:47:20,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 110 transitions, 1554 flow [2021-10-15 19:47:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-15 19:47:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-10-15 19:47:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 1714 transitions. [2021-10-15 19:47:20,192 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6801587301587302 [2021-10-15 19:47:20,192 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 1714 transitions. [2021-10-15 19:47:20,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 1714 transitions. [2021-10-15 19:47:20,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:20,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 1714 transitions. [2021-10-15 19:47:20,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 19.044444444444444) internal successors, (1714), 90 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:20,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 28.0) internal successors, (2548), 91 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:20,210 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 28.0) internal successors, (2548), 91 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:20,210 INFO L186 Difference]: Start difference. First operand has 282 places, 108 transitions, 1194 flow. Second operand 90 states and 1714 transitions. [2021-10-15 19:47:20,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 110 transitions, 1554 flow [2021-10-15 19:47:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 110 transitions, 1218 flow, removed 83 selfloop flow, removed 85 redundant places. [2021-10-15 19:47:20,433 INFO L242 Difference]: Finished difference. Result has 288 places, 110 transitions, 1220 flow [2021-10-15 19:47:20,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=1220, PETRI_PLACES=288, PETRI_TRANSITIONS=110} [2021-10-15 19:47:20,434 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 271 predicate places. [2021-10-15 19:47:20,434 INFO L470 AbstractCegarLoop]: Abstraction has has 288 places, 110 transitions, 1220 flow [2021-10-15 19:47:20,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 19.914893617021278) internal successors, (936), 47 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:20,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:20,435 INFO L254 CegarLoopForPetriNet]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:20,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:20,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-15 19:47:20,655 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash -317361877, now seen corresponding path program 40 times [2021-10-15 19:47:20,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:20,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527740126] [2021-10-15 19:47:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:20,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:20,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:20,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853544437] [2021-10-15 19:47:20,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:47:20,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:20,686 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:20,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-15 19:47:22,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:47:22,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-15 19:47:22,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:23,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:23,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527740126] [2021-10-15 19:47:23,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:23,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853544437] [2021-10-15 19:47:23,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853544437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:23,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:23,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-10-15 19:47:23,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553614914] [2021-10-15 19:47:23,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-15 19:47:23,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:23,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-15 19:47:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-10-15 19:47:23,852 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:23,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 110 transitions, 1220 flow. Second operand has 48 states, 48 states have (on average 19.916666666666668) internal successors, (956), 48 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:23,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:23,853 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:23,853 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:25,014 INFO L129 PetriNetUnfolder]: 132/1031 cut-off events. [2021-10-15 19:47:25,014 INFO L130 PetriNetUnfolder]: For 31854/31854 co-relation queries the response was YES. [2021-10-15 19:47:25,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4455 conditions, 1031 events. 132/1031 cut-off events. For 31854/31854 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2845 event pairs, 0 based on Foata normal form. 4/991 useless extension candidates. Maximal degree in co-relation 4360. Up to 306 conditions per place. [2021-10-15 19:47:25,022 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 91 changer transitions 0/112 dead transitions. [2021-10-15 19:47:25,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 112 transitions, 1588 flow [2021-10-15 19:47:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-15 19:47:25,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-10-15 19:47:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 1752 transitions. [2021-10-15 19:47:25,043 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6801242236024845 [2021-10-15 19:47:25,043 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 1752 transitions. [2021-10-15 19:47:25,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 1752 transitions. [2021-10-15 19:47:25,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:25,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 1752 transitions. [2021-10-15 19:47:25,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 19.043478260869566) internal successors, (1752), 92 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:25,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 28.0) internal successors, (2604), 93 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:25,050 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 28.0) internal successors, (2604), 93 states have internal predecessors, (2604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:25,051 INFO L186 Difference]: Start difference. First operand has 288 places, 110 transitions, 1220 flow. Second operand 92 states and 1752 transitions. [2021-10-15 19:47:25,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 112 transitions, 1588 flow [2021-10-15 19:47:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 112 transitions, 1244 flow, removed 85 selfloop flow, removed 87 redundant places. [2021-10-15 19:47:25,282 INFO L242 Difference]: Finished difference. Result has 294 places, 112 transitions, 1246 flow [2021-10-15 19:47:25,282 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=1246, PETRI_PLACES=294, PETRI_TRANSITIONS=112} [2021-10-15 19:47:25,283 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 277 predicate places. [2021-10-15 19:47:25,283 INFO L470 AbstractCegarLoop]: Abstraction has has 294 places, 112 transitions, 1246 flow [2021-10-15 19:47:25,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 19.916666666666668) internal successors, (956), 48 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:25,283 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:25,284 INFO L254 CegarLoopForPetriNet]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:25,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:25,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-15 19:47:25,505 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1801000999, now seen corresponding path program 41 times [2021-10-15 19:47:25,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:25,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287990476] [2021-10-15 19:47:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:25,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:25,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:25,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603698785] [2021-10-15 19:47:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-15 19:47:25,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:25,526 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:25,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-15 19:47:27,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-10-15 19:47:27,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-15 19:47:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:28,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287990476] [2021-10-15 19:47:28,945 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603698785] [2021-10-15 19:47:28,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603698785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:28,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:28,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-10-15 19:47:28,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928767197] [2021-10-15 19:47:28,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-15 19:47:28,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:28,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-15 19:47:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-10-15 19:47:28,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:28,948 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 112 transitions, 1246 flow. Second operand has 49 states, 49 states have (on average 19.918367346938776) internal successors, (976), 49 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:28,948 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:28,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:28,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:30,150 INFO L129 PetriNetUnfolder]: 135/1054 cut-off events. [2021-10-15 19:47:30,150 INFO L130 PetriNetUnfolder]: For 33299/33299 co-relation queries the response was YES. [2021-10-15 19:47:30,158 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4557 conditions, 1054 events. 135/1054 cut-off events. For 33299/33299 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2910 event pairs, 0 based on Foata normal form. 4/1013 useless extension candidates. Maximal degree in co-relation 4460. Up to 313 conditions per place. [2021-10-15 19:47:30,161 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 93 changer transitions 0/114 dead transitions. [2021-10-15 19:47:30,161 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 114 transitions, 1622 flow [2021-10-15 19:47:30,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-15 19:47:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2021-10-15 19:47:30,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 1790 transitions. [2021-10-15 19:47:30,171 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6800911854103343 [2021-10-15 19:47:30,171 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 1790 transitions. [2021-10-15 19:47:30,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 1790 transitions. [2021-10-15 19:47:30,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:30,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 1790 transitions. [2021-10-15 19:47:30,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 19.04255319148936) internal successors, (1790), 94 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:30,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 28.0) internal successors, (2660), 95 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:30,179 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 28.0) internal successors, (2660), 95 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:30,179 INFO L186 Difference]: Start difference. First operand has 294 places, 112 transitions, 1246 flow. Second operand 94 states and 1790 transitions. [2021-10-15 19:47:30,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 114 transitions, 1622 flow [2021-10-15 19:47:30,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 114 transitions, 1270 flow, removed 87 selfloop flow, removed 89 redundant places. [2021-10-15 19:47:30,343 INFO L242 Difference]: Finished difference. Result has 300 places, 114 transitions, 1272 flow [2021-10-15 19:47:30,343 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=94, PETRI_FLOW=1272, PETRI_PLACES=300, PETRI_TRANSITIONS=114} [2021-10-15 19:47:30,344 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 283 predicate places. [2021-10-15 19:47:30,344 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 114 transitions, 1272 flow [2021-10-15 19:47:30,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 19.918367346938776) internal successors, (976), 49 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:30,344 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:30,344 INFO L254 CegarLoopForPetriNet]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:30,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:30,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-15 19:47:30,560 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 42 times [2021-10-15 19:47:30,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:30,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416155387] [2021-10-15 19:47:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:30,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:30,580 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:30,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121964714] [2021-10-15 19:47:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-15 19:47:30,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:30,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:30,582 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:30,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-15 19:47:32,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-10-15 19:47:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-15 19:47:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:34,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:34,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416155387] [2021-10-15 19:47:34,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:34,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121964714] [2021-10-15 19:47:34,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121964714] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:34,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:34,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-10-15 19:47:34,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218482333] [2021-10-15 19:47:34,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-15 19:47:34,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-15 19:47:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-10-15 19:47:34,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:34,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 114 transitions, 1272 flow. Second operand has 50 states, 50 states have (on average 19.92) internal successors, (996), 50 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:34,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:34,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:34,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:35,230 INFO L129 PetriNetUnfolder]: 138/1077 cut-off events. [2021-10-15 19:47:35,230 INFO L130 PetriNetUnfolder]: For 34776/34776 co-relation queries the response was YES. [2021-10-15 19:47:35,238 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4659 conditions, 1077 events. 138/1077 cut-off events. For 34776/34776 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2975 event pairs, 0 based on Foata normal form. 4/1035 useless extension candidates. Maximal degree in co-relation 4560. Up to 320 conditions per place. [2021-10-15 19:47:35,240 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 95 changer transitions 0/116 dead transitions. [2021-10-15 19:47:35,240 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 116 transitions, 1656 flow [2021-10-15 19:47:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-15 19:47:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-10-15 19:47:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 1828 transitions. [2021-10-15 19:47:35,242 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6800595238095238 [2021-10-15 19:47:35,242 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 1828 transitions. [2021-10-15 19:47:35,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 1828 transitions. [2021-10-15 19:47:35,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:35,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 1828 transitions. [2021-10-15 19:47:35,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 19.041666666666668) internal successors, (1828), 96 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:35,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 28.0) internal successors, (2716), 97 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:35,247 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 28.0) internal successors, (2716), 97 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:35,247 INFO L186 Difference]: Start difference. First operand has 300 places, 114 transitions, 1272 flow. Second operand 96 states and 1828 transitions. [2021-10-15 19:47:35,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 116 transitions, 1656 flow [2021-10-15 19:47:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 116 transitions, 1296 flow, removed 89 selfloop flow, removed 91 redundant places. [2021-10-15 19:47:35,408 INFO L242 Difference]: Finished difference. Result has 306 places, 116 transitions, 1298 flow [2021-10-15 19:47:35,409 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=1298, PETRI_PLACES=306, PETRI_TRANSITIONS=116} [2021-10-15 19:47:35,409 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 289 predicate places. [2021-10-15 19:47:35,409 INFO L470 AbstractCegarLoop]: Abstraction has has 306 places, 116 transitions, 1298 flow [2021-10-15 19:47:35,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 19.92) internal successors, (996), 50 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:35,410 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:35,410 INFO L254 CegarLoopForPetriNet]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:35,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:35,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:35,636 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1218568985, now seen corresponding path program 43 times [2021-10-15 19:47:35,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:35,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647288616] [2021-10-15 19:47:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:35,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:35,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:35,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395733388] [2021-10-15 19:47:35,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-15 19:47:35,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:35,674 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:35,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-15 19:47:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:47:37,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-15 19:47:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:38,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:38,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647288616] [2021-10-15 19:47:38,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:38,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395733388] [2021-10-15 19:47:38,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395733388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:38,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:38,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-10-15 19:47:38,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685695215] [2021-10-15 19:47:38,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-15 19:47:38,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-15 19:47:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-10-15 19:47:38,982 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:38,983 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 116 transitions, 1298 flow. Second operand has 51 states, 51 states have (on average 19.92156862745098) internal successors, (1016), 51 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:38,983 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:38,983 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:38,983 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:40,275 INFO L129 PetriNetUnfolder]: 141/1100 cut-off events. [2021-10-15 19:47:40,276 INFO L130 PetriNetUnfolder]: For 36285/36285 co-relation queries the response was YES. [2021-10-15 19:47:40,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4761 conditions, 1100 events. 141/1100 cut-off events. For 36285/36285 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3040 event pairs, 0 based on Foata normal form. 4/1057 useless extension candidates. Maximal degree in co-relation 4660. Up to 327 conditions per place. [2021-10-15 19:47:40,284 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 97 changer transitions 0/118 dead transitions. [2021-10-15 19:47:40,284 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 118 transitions, 1690 flow [2021-10-15 19:47:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-15 19:47:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-10-15 19:47:40,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 1866 transitions. [2021-10-15 19:47:40,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6800291545189504 [2021-10-15 19:47:40,290 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 1866 transitions. [2021-10-15 19:47:40,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 1866 transitions. [2021-10-15 19:47:40,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:40,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 1866 transitions. [2021-10-15 19:47:40,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 19.040816326530614) internal successors, (1866), 98 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:40,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 28.0) internal successors, (2772), 99 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:40,295 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 28.0) internal successors, (2772), 99 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:40,295 INFO L186 Difference]: Start difference. First operand has 306 places, 116 transitions, 1298 flow. Second operand 98 states and 1866 transitions. [2021-10-15 19:47:40,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 118 transitions, 1690 flow [2021-10-15 19:47:40,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 118 transitions, 1322 flow, removed 91 selfloop flow, removed 93 redundant places. [2021-10-15 19:47:40,464 INFO L242 Difference]: Finished difference. Result has 312 places, 118 transitions, 1324 flow [2021-10-15 19:47:40,464 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=1324, PETRI_PLACES=312, PETRI_TRANSITIONS=118} [2021-10-15 19:47:40,465 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 295 predicate places. [2021-10-15 19:47:40,465 INFO L470 AbstractCegarLoop]: Abstraction has has 312 places, 118 transitions, 1324 flow [2021-10-15 19:47:40,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 19.92156862745098) internal successors, (1016), 51 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:40,465 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:40,465 INFO L254 CegarLoopForPetriNet]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:40,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:40,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:40,667 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash -94733653, now seen corresponding path program 44 times [2021-10-15 19:47:40,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:40,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966167029] [2021-10-15 19:47:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:40,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:40,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:40,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480490814] [2021-10-15 19:47:40,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:47:40,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:40,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:40,689 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:40,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-15 19:47:42,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:47:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-15 19:47:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:44,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:44,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966167029] [2021-10-15 19:47:44,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:44,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480490814] [2021-10-15 19:47:44,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480490814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:44,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:44,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-10-15 19:47:44,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427428570] [2021-10-15 19:47:44,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-15 19:47:44,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-15 19:47:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-10-15 19:47:44,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:44,213 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 118 transitions, 1324 flow. Second operand has 52 states, 52 states have (on average 19.923076923076923) internal successors, (1036), 52 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:44,213 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:44,213 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:44,214 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:45,612 INFO L129 PetriNetUnfolder]: 144/1123 cut-off events. [2021-10-15 19:47:45,612 INFO L130 PetriNetUnfolder]: For 37826/37826 co-relation queries the response was YES. [2021-10-15 19:47:45,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 1123 events. 144/1123 cut-off events. For 37826/37826 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3105 event pairs, 0 based on Foata normal form. 4/1079 useless extension candidates. Maximal degree in co-relation 4760. Up to 334 conditions per place. [2021-10-15 19:47:45,623 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 99 changer transitions 0/120 dead transitions. [2021-10-15 19:47:45,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 120 transitions, 1724 flow [2021-10-15 19:47:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-15 19:47:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-10-15 19:47:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 1904 transitions. [2021-10-15 19:47:45,625 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.68 [2021-10-15 19:47:45,625 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 1904 transitions. [2021-10-15 19:47:45,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 1904 transitions. [2021-10-15 19:47:45,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:45,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 1904 transitions. [2021-10-15 19:47:45,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 19.04) internal successors, (1904), 100 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:45,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 28.0) internal successors, (2828), 101 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:45,629 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 28.0) internal successors, (2828), 101 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:45,630 INFO L186 Difference]: Start difference. First operand has 312 places, 118 transitions, 1324 flow. Second operand 100 states and 1904 transitions. [2021-10-15 19:47:45,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 120 transitions, 1724 flow [2021-10-15 19:47:45,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 120 transitions, 1348 flow, removed 93 selfloop flow, removed 95 redundant places. [2021-10-15 19:47:45,810 INFO L242 Difference]: Finished difference. Result has 318 places, 120 transitions, 1350 flow [2021-10-15 19:47:45,810 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=1350, PETRI_PLACES=318, PETRI_TRANSITIONS=120} [2021-10-15 19:47:45,810 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 301 predicate places. [2021-10-15 19:47:45,810 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 120 transitions, 1350 flow [2021-10-15 19:47:45,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 19.923076923076923) internal successors, (1036), 52 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:45,811 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:45,811 INFO L254 CegarLoopForPetriNet]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:45,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-10-15 19:47:46,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:46,011 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:46,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:46,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1082904153, now seen corresponding path program 45 times [2021-10-15 19:47:46,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:46,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822553604] [2021-10-15 19:47:46,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:46,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:46,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:46,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422355765] [2021-10-15 19:47:46,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 19:47:46,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:46,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:46,033 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:46,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-15 19:47:48,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-10-15 19:47:48,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:47:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-15 19:47:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:47:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:47:49,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:47:49,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822553604] [2021-10-15 19:47:49,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:47:49,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422355765] [2021-10-15 19:47:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422355765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:47:49,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:47:49,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-10-15 19:47:49,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234017429] [2021-10-15 19:47:49,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-15 19:47:49,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:47:49,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-15 19:47:49,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-10-15 19:47:49,843 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-10-15 19:47:49,844 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 120 transitions, 1350 flow. Second operand has 53 states, 53 states have (on average 19.92452830188679) internal successors, (1056), 53 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:49,844 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:47:49,844 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-10-15 19:47:49,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:47:51,204 INFO L129 PetriNetUnfolder]: 147/1146 cut-off events. [2021-10-15 19:47:51,204 INFO L130 PetriNetUnfolder]: For 39399/39399 co-relation queries the response was YES. [2021-10-15 19:47:51,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 1146 events. 147/1146 cut-off events. For 39399/39399 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 3170 event pairs, 0 based on Foata normal form. 4/1101 useless extension candidates. Maximal degree in co-relation 4860. Up to 341 conditions per place. [2021-10-15 19:47:51,215 INFO L132 encePairwiseOnDemand]: 24/28 looper letters, 4 selfloop transitions, 101 changer transitions 0/122 dead transitions. [2021-10-15 19:47:51,216 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 122 transitions, 1758 flow [2021-10-15 19:47:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-15 19:47:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-10-15 19:47:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 1942 transitions. [2021-10-15 19:47:51,218 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6799719887955182 [2021-10-15 19:47:51,218 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 1942 transitions. [2021-10-15 19:47:51,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 1942 transitions. [2021-10-15 19:47:51,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:47:51,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 1942 transitions. [2021-10-15 19:47:51,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 19.03921568627451) internal successors, (1942), 102 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 28.0) internal successors, (2884), 103 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,226 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 28.0) internal successors, (2884), 103 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,226 INFO L186 Difference]: Start difference. First operand has 318 places, 120 transitions, 1350 flow. Second operand 102 states and 1942 transitions. [2021-10-15 19:47:51,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 122 transitions, 1758 flow [2021-10-15 19:47:51,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 122 transitions, 1374 flow, removed 95 selfloop flow, removed 97 redundant places. [2021-10-15 19:47:51,414 INFO L242 Difference]: Finished difference. Result has 324 places, 122 transitions, 1376 flow [2021-10-15 19:47:51,415 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=1376, PETRI_PLACES=324, PETRI_TRANSITIONS=122} [2021-10-15 19:47:51,415 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 307 predicate places. [2021-10-15 19:47:51,415 INFO L470 AbstractCegarLoop]: Abstraction has has 324 places, 122 transitions, 1376 flow [2021-10-15 19:47:51,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 19.92452830188679) internal successors, (1056), 53 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:47:51,415 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:47:51,416 INFO L254 CegarLoopForPetriNet]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:47:51,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-15 19:47:51,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:51,621 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:47:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:47:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 46 times [2021-10-15 19:47:51,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:47:51,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323109542] [2021-10-15 19:47:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:47:51,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:47:51,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:47:51,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104014432] [2021-10-15 19:47:51,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-15 19:47:51,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:47:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:47:51,642 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:47:51,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-15 19:47:53,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-15 19:47:53,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-15 19:47:53,823 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:47:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:47:54,180 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:47:54,181 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:47:54,182 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:47:54,183 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:47:54,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-15 19:47:54,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-15 19:47:54,411 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:47:54,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:47:54 BoogieIcfgContainer [2021-10-15 19:47:54,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:47:54,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:47:54,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:47:54,564 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:47:54,565 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:45:30" (3/4) ... [2021-10-15 19:47:54,566 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:47:54,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:47:54,707 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:47:54,708 INFO L168 Benchmark]: Toolchain (without parser) took 144936.13 ms. Allocated memory was 92.3 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 56.9 MB in the beginning and 611.8 MB in the end (delta: -554.9 MB). Peak memory consumption was 469.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,709 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:47:54,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.71 ms. Allocated memory is still 92.3 MB. Free memory was 56.8 MB in the beginning and 67.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.56 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 65.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,710 INFO L168 Benchmark]: Boogie Preprocessor took 25.56 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 65.0 MB in the end (delta: 947.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,710 INFO L168 Benchmark]: RCFGBuilder took 334.99 ms. Allocated memory is still 92.3 MB. Free memory was 65.0 MB in the beginning and 55.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,710 INFO L168 Benchmark]: TraceAbstraction took 144088.04 ms. Allocated memory was 92.3 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 54.9 MB in the beginning and 630.7 MB in the end (delta: -575.8 MB). Peak memory consumption was 451.8 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,711 INFO L168 Benchmark]: Witness Printer took 143.07 ms. Allocated memory is still 1.1 GB. Free memory was 630.7 MB in the beginning and 611.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-15 19:47:54,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory was 65.2 MB in the beginning and 65.2 MB in the end (delta: 27.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.71 ms. Allocated memory is still 92.3 MB. Free memory was 56.8 MB in the beginning and 67.6 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.56 ms. Allocated memory is still 92.3 MB. Free memory was 67.6 MB in the beginning and 65.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.56 ms. Allocated memory is still 92.3 MB. Free memory was 65.9 MB in the beginning and 65.0 MB in the end (delta: 947.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 334.99 ms. Allocated memory is still 92.3 MB. Free memory was 65.0 MB in the beginning and 55.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 144088.04 ms. Allocated memory was 92.3 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 54.9 MB in the beginning and 630.7 MB in the end (delta: -575.8 MB). Peak memory consumption was 451.8 MB. Max. memory is 16.1 GB. * Witness Printer took 143.07 ms. Allocated memory is still 1.1 GB. Free memory was 630.7 MB in the beginning and 611.8 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=21] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=21] [L36] EXPR counter++ VAL [counter=22] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=22] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=22] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=22] [L36] EXPR counter++ VAL [counter=23] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=23] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=23] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=23] [L36] EXPR counter++ VAL [counter=24] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=24] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=24] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=24] [L36] EXPR counter++ VAL [counter=25] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=25] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=25] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=25] [L36] EXPR counter++ VAL [counter=26] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=26] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=26] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=26] [L36] EXPR counter++ VAL [counter=27] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=27] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=27] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=27] [L36] EXPR counter++ VAL [counter=28] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=28] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=28] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=28] [L36] EXPR counter++ VAL [counter=29] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=29] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=29] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=29] [L36] EXPR counter++ VAL [counter=30] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=30] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=30] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=30] [L36] EXPR counter++ VAL [counter=31] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=31] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=31] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=31] [L36] EXPR counter++ VAL [counter=32] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=32] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=32] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=32] [L36] EXPR counter++ VAL [counter=33] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=33] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=33] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=33] [L36] EXPR counter++ VAL [counter=34] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=34] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=34] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=34] [L36] EXPR counter++ VAL [counter=35] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=35] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=35] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=35] [L36] EXPR counter++ VAL [counter=36] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=36] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=36] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=36] [L36] EXPR counter++ VAL [counter=37] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=37] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=37] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=37] [L36] EXPR counter++ VAL [counter=38] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=38] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=38] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=38] [L36] EXPR counter++ VAL [counter=39] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=39] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=39] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=39] [L36] EXPR counter++ VAL [counter=40] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=40] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=40] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=40] [L36] EXPR counter++ VAL [counter=41] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=41] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=41] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=41] [L36] EXPR counter++ VAL [counter=42] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=42] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=42] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=42] [L36] EXPR counter++ VAL [counter=43] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=43] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=43] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=43] [L36] EXPR counter++ VAL [counter=44] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=44] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=44] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=44] [L36] EXPR counter++ VAL [counter=45] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=45] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=45] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=45] [L36] EXPR counter++ VAL [counter=46] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=46] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=46] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=46] [L36] EXPR counter++ VAL [counter=47] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=47] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=47] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=47] [L36] EXPR counter++ VAL [counter=48] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=48] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=48] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=48] [L36] EXPR counter++ VAL [counter=49] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=49] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=49] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=49] [L36] EXPR counter++ VAL [counter=50] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=50] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=50] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=50] [L36] EXPR counter++ VAL [counter=51] [L36] COND FALSE !(counter++<50) [L16] COND TRUE !(cond) VAL [counter=51] [L18] reach_error() VAL [counter=51] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 13.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 143844.7ms, OverallIterations: 55, TraceHistogramMax: 51, EmptinessCheckTime: 0.0ms, AutomataDifference: 38991.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 94.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 163 SDtfs, 214 SDslu, 264 SDs, 0 SdLazy, 2942 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3243.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7911 GetRequests, 5341 SyntacticMatches, 0 SemanticMatches, 2570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20831 ImplicationChecksByTransitivity, 39930.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1376occurred in iteration=54, InterpolantAutomatonStates: 2670, 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: 880.1ms SsaConstructionTime, 6485.9ms SatisfiabilityAnalysisTime, 41374.1ms InterpolantComputationTime, 7000 NumberOfCodeBlocks, 7000 NumberOfCodeBlocksAsserted, 686 NumberOfCheckSat, 6685 ConstructedInterpolants, 0 QuantifiedInterpolants, 19781 SizeOfPredicates, 1241 NumberOfNonLiveVariables, 26994 ConjunctsInSsa, 2629 ConjunctsInUnsatCore, 54 InterpolantComputations, 4 PerfectInterpolantSequences, 18/100488 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:47:54,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d27248e-b412-48f5-86fc-2f62d61dedba/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...