./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/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 927abfca40085ffd8a03ed58ebf935ccc46ff1be ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 20:08:04,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:08:04,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:08:04,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:08:04,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:08:04,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:08:04,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:08:04,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:08:04,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:08:04,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:08:04,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:08:04,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:08:04,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:08:04,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:08:04,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:08:04,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:08:04,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:08:04,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:08:04,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:08:04,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:08:04,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:08:04,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:08:04,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:08:04,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:08:04,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:08:04,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:08:04,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:08:04,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:08:04,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:08:04,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:08:04,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:08:04,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:08:04,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:08:04,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:08:04,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:08:04,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:08:04,384 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:08:04,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:08:04,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:08:04,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:08:04,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:08:04,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:08:04,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:08:04,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:08:04,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:08:04,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:08:04,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:08:04,417 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:08:04,417 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:08:04,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:08:04,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:08:04,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:08:04,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:08:04,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:08:04,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:08:04,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:08:04,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:08:04,419 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:08:04,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:08:04,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:08:04,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:08:04,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:08:04,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:08:04,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:08:04,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:04,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:08:04,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:08:04,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:08:04,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:08:04,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:08:04,422 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:08:04,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:08:04,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:08:04,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:08:04,423 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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927abfca40085ffd8a03ed58ebf935ccc46ff1be [2021-10-15 20:08:04,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:08:04,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:08:04,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:08:04,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:08:04,766 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:08:04,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-10-15 20:08:04,844 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/data/0c18e22f0/319e8e35307e4c239c80f51e7919abaa/FLAGf233d84c9 [2021-10-15 20:08:05,430 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:08:05,431 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2021-10-15 20:08:05,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/data/0c18e22f0/319e8e35307e4c239c80f51e7919abaa/FLAGf233d84c9 [2021-10-15 20:08:05,793 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/data/0c18e22f0/319e8e35307e4c239c80f51e7919abaa [2021-10-15 20:08:05,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:08:05,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:08:05,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:05,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:08:05,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:08:05,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:05" (1/1) ... [2021-10-15 20:08:05,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e44754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:05, skipping insertion in model container [2021-10-15 20:08:05,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:05" (1/1) ... [2021-10-15 20:08:05,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:08:05,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:08:06,035 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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-10-15 20:08:06,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:06,071 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:08:06,088 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_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound2.c[524,537] [2021-10-15 20:08:06,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:06,143 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:08:06,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06 WrapperNode [2021-10-15 20:08:06,144 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:06,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:08:06,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:08:06,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:08:06,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:08:06,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:08:06,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:08:06,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:08:06,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:08:06,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:08:06,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:08:06,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:08:06,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (1/1) ... [2021-10-15 20:08:06,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:06,266 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:08:06,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:08:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:08:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:08:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:08:06,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:08:06,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:08:06,670 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 20:08:06,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:06 BoogieIcfgContainer [2021-10-15 20:08:06,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:08:06,673 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:08:06,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:08:06,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:08:06,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:08:05" (1/3) ... [2021-10-15 20:08:06,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e9095e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:06, skipping insertion in model container [2021-10-15 20:08:06,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:06" (2/3) ... [2021-10-15 20:08:06,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59e9095e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:06, skipping insertion in model container [2021-10-15 20:08:06,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:06" (3/3) ... [2021-10-15 20:08:06,695 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2021-10-15 20:08:06,700 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:08:06,701 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-15 20:08:06,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:08:06,786 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 20:08:06,787 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-15 20:08:06,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 25 places, 34 transitions, 68 flow [2021-10-15 20:08:06,840 INFO L129 PetriNetUnfolder]: 10/34 cut-off events. [2021-10-15 20:08:06,840 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:08:06,844 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 34 events. 10/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-10-15 20:08:06,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 34 transitions, 68 flow [2021-10-15 20:08:06,860 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 29 transitions, 58 flow [2021-10-15 20:08:06,864 INFO L129 PetriNetUnfolder]: 5/18 cut-off events. [2021-10-15 20:08:06,869 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:08:06,870 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:06,871 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:06,872 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:06,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2021-10-15 20:08:06,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:06,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145536267] [2021-10-15 20:08:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:06,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:07,096 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 20:08:07,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:07,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145536267] [2021-10-15 20:08:07,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145536267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:07,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:07,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:08:07,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140128674] [2021-10-15 20:08:07,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:08:07,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:08:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:08:07,126 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 34 [2021-10-15 20:08:07,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 29 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:07,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 34 [2021-10-15 20:08:07,132 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:07,147 INFO L129 PetriNetUnfolder]: 5/25 cut-off events. [2021-10-15 20:08:07,148 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:08:07,151 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 25 events. 5/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 4/22 useless extension candidates. Maximal degree in co-relation 25. Up to 5 conditions per place. [2021-10-15 20:08:07,153 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 0 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2021-10-15 20:08:07,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 50 flow [2021-10-15 20:08:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:08:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:08:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 62 transitions. [2021-10-15 20:08:07,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9117647058823529 [2021-10-15 20:08:07,168 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 62 transitions. [2021-10-15 20:08:07,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 62 transitions. [2021-10-15 20:08:07,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:07,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 62 transitions. [2021-10-15 20:08:07,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,179 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,181 INFO L186 Difference]: Start difference. First operand has 21 places, 29 transitions, 58 flow. Second operand 2 states and 62 transitions. [2021-10-15 20:08:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 50 flow [2021-10-15 20:08:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 25 transitions, 50 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:08:07,185 INFO L242 Difference]: Finished difference. Result has 22 places, 25 transitions, 50 flow [2021-10-15 20:08:07,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=22, PETRI_TRANSITIONS=25} [2021-10-15 20:08:07,188 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2021-10-15 20:08:07,188 INFO L470 AbstractCegarLoop]: Abstraction has has 22 places, 25 transitions, 50 flow [2021-10-15 20:08:07,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.5) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:07,189 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:07,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:08:07,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:07,190 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-15 20:08:07,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:07,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870018731] [2021-10-15 20:08:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:07,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:07,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:07,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558502051] [2021-10-15 20:08:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:07,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:07,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:07,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:08:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:08:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:07,598 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 20:08:07,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:07,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870018731] [2021-10-15 20:08:07,599 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:07,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558502051] [2021-10-15 20:08:07,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558502051] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:07,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:07,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:07,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124827945] [2021-10-15 20:08:07,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:07,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:07,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:07,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:07,604 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:07,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 25 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:07,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:07,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:07,739 INFO L129 PetriNetUnfolder]: 10/49 cut-off events. [2021-10-15 20:08:07,742 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:08:07,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 49 events. 10/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 85. Up to 20 conditions per place. [2021-10-15 20:08:07,744 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 27 selfloop transitions, 9 changer transitions 0/43 dead transitions. [2021-10-15 20:08:07,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 158 flow [2021-10-15 20:08:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:08:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2021-10-15 20:08:07,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2021-10-15 20:08:07,751 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2021-10-15 20:08:07,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2021-10-15 20:08:07,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:07,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2021-10-15 20:08:07,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,762 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,763 INFO L186 Difference]: Start difference. First operand has 22 places, 25 transitions, 50 flow. Second operand 5 states and 87 transitions. [2021-10-15 20:08:07,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 158 flow [2021-10-15 20:08:07,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:08:07,766 INFO L242 Difference]: Finished difference. Result has 28 places, 33 transitions, 112 flow [2021-10-15 20:08:07,766 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=33} [2021-10-15 20:08:07,767 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2021-10-15 20:08:07,767 INFO L470 AbstractCegarLoop]: Abstraction has has 28 places, 33 transitions, 112 flow [2021-10-15 20:08:07,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:07,768 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:07,768 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:07,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:07,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-15 20:08:07,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:07,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1182850160, now seen corresponding path program 1 times [2021-10-15 20:08:07,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:07,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863411244] [2021-10-15 20:08:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:07,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:08,020 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:08,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487639321] [2021-10-15 20:08:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:08,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:08,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:08,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:08:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:08,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:08:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:08,158 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 20:08:08,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:08,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863411244] [2021-10-15 20:08:08,159 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:08,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487639321] [2021-10-15 20:08:08,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487639321] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:08,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:08,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:08:08,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524283072] [2021-10-15 20:08:08,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:08,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:08,166 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 34 [2021-10-15 20:08:08,167 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 33 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:08,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:08,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 34 [2021-10-15 20:08:08,168 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:08,194 INFO L129 PetriNetUnfolder]: 9/47 cut-off events. [2021-10-15 20:08:08,194 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 20:08:08,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 47 events. 9/47 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 99 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 81. Up to 12 conditions per place. [2021-10-15 20:08:08,195 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 5 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2021-10-15 20:08:08,195 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 130 flow [2021-10-15 20:08:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:08:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 20:08:08,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2021-10-15 20:08:08,201 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2021-10-15 20:08:08,202 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 104 transitions. [2021-10-15 20:08:08,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 104 transitions. [2021-10-15 20:08:08,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:08,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 104 transitions. [2021-10-15 20:08:08,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:08,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:08,205 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:08,205 INFO L186 Difference]: Start difference. First operand has 28 places, 33 transitions, 112 flow. Second operand 4 states and 104 transitions. [2021-10-15 20:08:08,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 130 flow [2021-10-15 20:08:08,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 130 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:08:08,209 INFO L242 Difference]: Finished difference. Result has 33 places, 34 transitions, 128 flow [2021-10-15 20:08:08,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=33, PETRI_TRANSITIONS=34} [2021-10-15 20:08:08,210 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 12 predicate places. [2021-10-15 20:08:08,210 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 34 transitions, 128 flow [2021-10-15 20:08:08,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:08,210 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:08,210 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:08,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:08,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:08,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:08,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:08,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1415754199, now seen corresponding path program 1 times [2021-10-15 20:08:08,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:08,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819561095] [2021-10-15 20:08:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:08,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:08,464 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:08,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378705862] [2021-10-15 20:08:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:08,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:08,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:08,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:08:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:08:08,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:09,036 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 20:08:09,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:09,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819561095] [2021-10-15 20:08:09,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:09,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378705862] [2021-10-15 20:08:09,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378705862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:09,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:09,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:08:09,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431618268] [2021-10-15 20:08:09,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:08:09,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:09,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:08:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:08:09,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:08:09,043 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 34 transitions, 128 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:09,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:09,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:08:09,044 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:14,821 INFO L129 PetriNetUnfolder]: 14/79 cut-off events. [2021-10-15 20:08:14,821 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-10-15 20:08:14,822 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 79 events. 14/79 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 254 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 194. Up to 21 conditions per place. [2021-10-15 20:08:14,823 INFO L132 encePairwiseOnDemand]: 20/34 looper letters, 26 selfloop transitions, 26 changer transitions 0/59 dead transitions. [2021-10-15 20:08:14,823 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 314 flow [2021-10-15 20:08:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:08:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:08:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2021-10-15 20:08:14,830 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37254901960784315 [2021-10-15 20:08:14,831 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 152 transitions. [2021-10-15 20:08:14,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 152 transitions. [2021-10-15 20:08:14,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:14,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 152 transitions. [2021-10-15 20:08:14,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 12.666666666666666) internal successors, (152), 12 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:14,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 34.0) internal successors, (442), 13 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:14,834 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 34.0) internal successors, (442), 13 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:14,835 INFO L186 Difference]: Start difference. First operand has 33 places, 34 transitions, 128 flow. Second operand 12 states and 152 transitions. [2021-10-15 20:08:14,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 314 flow [2021-10-15 20:08:14,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 20:08:14,843 INFO L242 Difference]: Finished difference. Result has 47 places, 50 transitions, 294 flow [2021-10-15 20:08:14,843 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=294, PETRI_PLACES=47, PETRI_TRANSITIONS=50} [2021-10-15 20:08:14,843 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2021-10-15 20:08:14,843 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 50 transitions, 294 flow [2021-10-15 20:08:14,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:14,844 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:14,844 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:14,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:15,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:15,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:15,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1005087291, now seen corresponding path program 1 times [2021-10-15 20:08:15,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:15,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727929819] [2021-10-15 20:08:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:15,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:15,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:15,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883616993] [2021-10-15 20:08:15,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:15,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:15,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:08:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:15,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-15 20:08:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:16,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:16,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727929819] [2021-10-15 20:08:16,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:16,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883616993] [2021-10-15 20:08:16,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883616993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:16,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:16,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-10-15 20:08:16,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516107468] [2021-10-15 20:08:16,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:08:16,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:16,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:08:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:16,597 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:08:16,597 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 50 transitions, 294 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:16,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:16,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:08:16,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:17,113 INFO L129 PetriNetUnfolder]: 19/103 cut-off events. [2021-10-15 20:08:17,114 INFO L130 PetriNetUnfolder]: For 121/121 co-relation queries the response was YES. [2021-10-15 20:08:17,114 INFO L84 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 103 events. 19/103 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 395 event pairs, 0 based on Foata normal form. 1/100 useless extension candidates. Maximal degree in co-relation 336. Up to 45 conditions per place. [2021-10-15 20:08:17,117 INFO L132 encePairwiseOnDemand]: 24/34 looper letters, 47 selfloop transitions, 21 changer transitions 0/75 dead transitions. [2021-10-15 20:08:17,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 547 flow [2021-10-15 20:08:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:08:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:08:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2021-10-15 20:08:17,124 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2021-10-15 20:08:17,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 132 transitions. [2021-10-15 20:08:17,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 132 transitions. [2021-10-15 20:08:17,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:17,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 132 transitions. [2021-10-15 20:08:17,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,132 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,133 INFO L186 Difference]: Start difference. First operand has 47 places, 50 transitions, 294 flow. Second operand 9 states and 132 transitions. [2021-10-15 20:08:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 547 flow [2021-10-15 20:08:17,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 534 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-10-15 20:08:17,143 INFO L242 Difference]: Finished difference. Result has 54 places, 59 transitions, 425 flow [2021-10-15 20:08:17,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=425, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2021-10-15 20:08:17,144 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 33 predicate places. [2021-10-15 20:08:17,145 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 425 flow [2021-10-15 20:08:17,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,145 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:17,145 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:17,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:17,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:17,369 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash 965004492, now seen corresponding path program 1 times [2021-10-15 20:08:17,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:17,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858542919] [2021-10-15 20:08:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:17,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:17,389 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:17,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083052385] [2021-10-15 20:08:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:17,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:17,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:17,405 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:17,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:08:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:17,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:08:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:17,606 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 20:08:17,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:17,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858542919] [2021-10-15 20:08:17,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:17,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083052385] [2021-10-15 20:08:17,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083052385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:17,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:08:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243957421] [2021-10-15 20:08:17,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:08:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:08:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:08:17,610 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2021-10-15 20:08:17,610 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 425 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,611 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:17,611 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2021-10-15 20:08:17,611 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:17,788 INFO L129 PetriNetUnfolder]: 23/137 cut-off events. [2021-10-15 20:08:17,788 INFO L130 PetriNetUnfolder]: For 264/264 co-relation queries the response was YES. [2021-10-15 20:08:17,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 137 events. 23/137 cut-off events. For 264/264 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 609 event pairs, 0 based on Foata normal form. 4/136 useless extension candidates. Maximal degree in co-relation 490. Up to 52 conditions per place. [2021-10-15 20:08:17,790 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 59 selfloop transitions, 12 changer transitions 5/83 dead transitions. [2021-10-15 20:08:17,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 719 flow [2021-10-15 20:08:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:08:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2021-10-15 20:08:17,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4327731092436975 [2021-10-15 20:08:17,793 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 103 transitions. [2021-10-15 20:08:17,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 103 transitions. [2021-10-15 20:08:17,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:17,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 103 transitions. [2021-10-15 20:08:17,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,796 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,796 INFO L186 Difference]: Start difference. First operand has 54 places, 59 transitions, 425 flow. Second operand 7 states and 103 transitions. [2021-10-15 20:08:17,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 719 flow [2021-10-15 20:08:17,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 83 transitions, 691 flow, removed 8 selfloop flow, removed 4 redundant places. [2021-10-15 20:08:17,805 INFO L242 Difference]: Finished difference. Result has 59 places, 59 transitions, 449 flow [2021-10-15 20:08:17,805 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2021-10-15 20:08:17,805 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2021-10-15 20:08:17,805 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 449 flow [2021-10-15 20:08:17,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:17,806 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:17,806 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:17,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:18,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:18,025 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1175899963, now seen corresponding path program 1 times [2021-10-15 20:08:18,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:18,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95758461] [2021-10-15 20:08:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:18,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:18,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:18,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932936754] [2021-10-15 20:08:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:18,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:18,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:18,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:08:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:18,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 20:08:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:18,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:18,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95758461] [2021-10-15 20:08:18,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:18,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932936754] [2021-10-15 20:08:18,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932936754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:18,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:18,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:08:18,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528482893] [2021-10-15 20:08:18,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:18,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:18,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:18,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:18,371 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:18,372 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 449 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,372 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:18,372 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:18,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:18,628 INFO L129 PetriNetUnfolder]: 28/153 cut-off events. [2021-10-15 20:08:18,628 INFO L130 PetriNetUnfolder]: For 277/277 co-relation queries the response was YES. [2021-10-15 20:08:18,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 153 events. 28/153 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 633 event pairs, 0 based on Foata normal form. 1/148 useless extension candidates. Maximal degree in co-relation 564. Up to 86 conditions per place. [2021-10-15 20:08:18,631 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 51 selfloop transitions, 19 changer transitions 0/78 dead transitions. [2021-10-15 20:08:18,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 694 flow [2021-10-15 20:08:18,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:08:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2021-10-15 20:08:18,633 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2021-10-15 20:08:18,633 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 114 transitions. [2021-10-15 20:08:18,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 114 transitions. [2021-10-15 20:08:18,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:18,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 114 transitions. [2021-10-15 20:08:18,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,636 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,636 INFO L186 Difference]: Start difference. First operand has 59 places, 59 transitions, 449 flow. Second operand 7 states and 114 transitions. [2021-10-15 20:08:18,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 694 flow [2021-10-15 20:08:18,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 78 transitions, 669 flow, removed 5 selfloop flow, removed 5 redundant places. [2021-10-15 20:08:18,643 INFO L242 Difference]: Finished difference. Result has 59 places, 67 transitions, 573 flow [2021-10-15 20:08:18,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=573, PETRI_PLACES=59, PETRI_TRANSITIONS=67} [2021-10-15 20:08:18,644 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2021-10-15 20:08:18,644 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 67 transitions, 573 flow [2021-10-15 20:08:18,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:18,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:18,645 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:18,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-15 20:08:18,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:18,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:18,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:18,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1092907201, now seen corresponding path program 1 times [2021-10-15 20:08:18,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:18,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432525656] [2021-10-15 20:08:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:18,848 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:18,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:18,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190576374] [2021-10-15 20:08:18,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:18,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:18,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:18,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:18,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:08:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 20:08:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:19,033 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 20:08:19,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:19,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432525656] [2021-10-15 20:08:19,033 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:19,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190576374] [2021-10-15 20:08:19,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190576374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:19,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:19,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 20:08:19,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626648938] [2021-10-15 20:08:19,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:19,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:19,035 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 34 [2021-10-15 20:08:19,036 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 67 transitions, 573 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:19,036 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:19,036 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 34 [2021-10-15 20:08:19,036 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:19,072 INFO L129 PetriNetUnfolder]: 27/135 cut-off events. [2021-10-15 20:08:19,072 INFO L130 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2021-10-15 20:08:19,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 484 conditions, 135 events. 27/135 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 508 event pairs, 0 based on Foata normal form. 3/132 useless extension candidates. Maximal degree in co-relation 465. Up to 34 conditions per place. [2021-10-15 20:08:19,074 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 9 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2021-10-15 20:08:19,075 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 566 flow [2021-10-15 20:08:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:08:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:08:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2021-10-15 20:08:19,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7549019607843137 [2021-10-15 20:08:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 154 transitions. [2021-10-15 20:08:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 154 transitions. [2021-10-15 20:08:19,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:19,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 154 transitions. [2021-10-15 20:08:19,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.666666666666668) internal successors, (154), 6 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:19,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:19,079 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:19,079 INFO L186 Difference]: Start difference. First operand has 59 places, 67 transitions, 573 flow. Second operand 6 states and 154 transitions. [2021-10-15 20:08:19,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 566 flow [2021-10-15 20:08:19,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 523 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-10-15 20:08:19,086 INFO L242 Difference]: Finished difference. Result has 61 places, 65 transitions, 515 flow [2021-10-15 20:08:19,086 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=515, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2021-10-15 20:08:19,086 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2021-10-15 20:08:19,086 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 515 flow [2021-10-15 20:08:19,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:19,087 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:19,087 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:19,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:19,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:19,309 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -2114224192, now seen corresponding path program 1 times [2021-10-15 20:08:19,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:19,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363769098] [2021-10-15 20:08:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:19,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:19,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:19,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766506899] [2021-10-15 20:08:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:19,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:19,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:19,333 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:19,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:08:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 20:08:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:19,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:19,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363769098] [2021-10-15 20:08:19,724 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:19,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766506899] [2021-10-15 20:08:19,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766506899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:19,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:19,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-15 20:08:19,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604844472] [2021-10-15 20:08:19,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:08:19,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:19,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:08:19,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:08:19,727 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:19,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 515 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 20:08:19,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:19,727 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:19,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:20,390 INFO L129 PetriNetUnfolder]: 31/157 cut-off events. [2021-10-15 20:08:20,390 INFO L130 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2021-10-15 20:08:20,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 157 events. 31/157 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 645 event pairs, 0 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 611. Up to 91 conditions per place. [2021-10-15 20:08:20,393 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 60 selfloop transitions, 16 changer transitions 0/85 dead transitions. [2021-10-15 20:08:20,393 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 776 flow [2021-10-15 20:08:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:08:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2021-10-15 20:08:20,395 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4831932773109244 [2021-10-15 20:08:20,395 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 115 transitions. [2021-10-15 20:08:20,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 115 transitions. [2021-10-15 20:08:20,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:20,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 115 transitions. [2021-10-15 20:08:20,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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 20:08:20,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:20,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:20,397 INFO L186 Difference]: Start difference. First operand has 61 places, 65 transitions, 515 flow. Second operand 7 states and 115 transitions. [2021-10-15 20:08:20,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 776 flow [2021-10-15 20:08:20,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 757 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-10-15 20:08:20,407 INFO L242 Difference]: Finished difference. Result has 65 places, 73 transitions, 635 flow [2021-10-15 20:08:20,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2021-10-15 20:08:20,407 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 44 predicate places. [2021-10-15 20:08:20,407 INFO L470 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 635 flow [2021-10-15 20:08:20,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 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 20:08:20,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:20,408 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:20,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:20,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:20,636 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2112377150, now seen corresponding path program 1 times [2021-10-15 20:08:20,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:20,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483368672] [2021-10-15 20:08:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:20,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:20,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:20,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659431959] [2021-10-15 20:08:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:20,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:20,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:20,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:08:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 20:08:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:20,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:21,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483368672] [2021-10-15 20:08:21,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:21,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659431959] [2021-10-15 20:08:21,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659431959] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:21,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:21,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:08:21,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204849957] [2021-10-15 20:08:21,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:21,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:21,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:21,002 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:21,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 635 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:21,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:21,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:21,290 INFO L129 PetriNetUnfolder]: 35/177 cut-off events. [2021-10-15 20:08:21,290 INFO L130 PetriNetUnfolder]: For 534/534 co-relation queries the response was YES. [2021-10-15 20:08:21,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 177 events. 35/177 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 791 event pairs, 0 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 713. Up to 107 conditions per place. [2021-10-15 20:08:21,292 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 67 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2021-10-15 20:08:21,293 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 909 flow [2021-10-15 20:08:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 20:08:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2021-10-15 20:08:21,294 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4831932773109244 [2021-10-15 20:08:21,294 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 115 transitions. [2021-10-15 20:08:21,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 115 transitions. [2021-10-15 20:08:21,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:21,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 115 transitions. [2021-10-15 20:08:21,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 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 20:08:21,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,297 INFO L186 Difference]: Start difference. First operand has 65 places, 73 transitions, 635 flow. Second operand 7 states and 115 transitions. [2021-10-15 20:08:21,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 909 flow [2021-10-15 20:08:21,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 884 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-15 20:08:21,305 INFO L242 Difference]: Finished difference. Result has 71 places, 80 transitions, 746 flow [2021-10-15 20:08:21,305 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2021-10-15 20:08:21,306 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 50 predicate places. [2021-10-15 20:08:21,306 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 746 flow [2021-10-15 20:08:21,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:21,306 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:21,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-15 20:08:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:08:21,521 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1951591878, now seen corresponding path program 1 times [2021-10-15 20:08:21,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:21,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343257015] [2021-10-15 20:08:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:21,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:21,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:21,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369572529] [2021-10-15 20:08:21,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:21,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:21,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:21,547 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:08:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:08:21,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:21,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:21,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343257015] [2021-10-15 20:08:21,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:21,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369572529] [2021-10-15 20:08:21,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369572529] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:21,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:21,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:08:21,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242718425] [2021-10-15 20:08:21,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:21,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:21,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:21,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:21,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 34 [2021-10-15 20:08:21,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 746 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:21,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 34 [2021-10-15 20:08:21,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:21,968 INFO L129 PetriNetUnfolder]: 36/190 cut-off events. [2021-10-15 20:08:21,968 INFO L130 PetriNetUnfolder]: For 719/719 co-relation queries the response was YES. [2021-10-15 20:08:21,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 190 events. 36/190 cut-off events. For 719/719 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 927 event pairs, 0 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 756. Up to 54 conditions per place. [2021-10-15 20:08:21,971 INFO L132 encePairwiseOnDemand]: 26/34 looper letters, 64 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2021-10-15 20:08:21,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 1057 flow [2021-10-15 20:08:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:08:21,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:08:21,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2021-10-15 20:08:21,973 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2021-10-15 20:08:21,973 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 120 transitions. [2021-10-15 20:08:21,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 120 transitions. [2021-10-15 20:08:21,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:21,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 120 transitions. [2021-10-15 20:08:21,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,977 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,977 INFO L186 Difference]: Start difference. First operand has 71 places, 80 transitions, 746 flow. Second operand 6 states and 120 transitions. [2021-10-15 20:08:21,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 1057 flow [2021-10-15 20:08:21,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 1016 flow, removed 17 selfloop flow, removed 2 redundant places. [2021-10-15 20:08:21,987 INFO L242 Difference]: Finished difference. Result has 75 places, 81 transitions, 779 flow [2021-10-15 20:08:21,988 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2021-10-15 20:08:21,988 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2021-10-15 20:08:21,988 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 779 flow [2021-10-15 20:08:21,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:21,988 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:21,989 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:22,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:22,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:08:22,213 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:22,213 INFO L82 PathProgramCache]: Analyzing trace with hash 847401621, now seen corresponding path program 1 times [2021-10-15 20:08:22,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:22,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515667774] [2021-10-15 20:08:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:22,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:22,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:22,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220296871] [2021-10-15 20:08:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:22,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:22,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:22,222 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:22,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:08:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:22,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:08:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:22,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:22,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515667774] [2021-10-15 20:08:22,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:22,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220296871] [2021-10-15 20:08:22,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220296871] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:22,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:22,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:08:22,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266702826] [2021-10-15 20:08:22,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:08:22,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:22,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:08:22,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:08:22,595 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:22,595 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 779 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:22,595 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:22,595 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:22,595 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:29,609 INFO L129 PetriNetUnfolder]: 49/268 cut-off events. [2021-10-15 20:08:29,609 INFO L130 PetriNetUnfolder]: For 1028/1028 co-relation queries the response was YES. [2021-10-15 20:08:29,611 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 268 events. 49/268 cut-off events. For 1028/1028 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1572 event pairs, 0 based on Foata normal form. 2/261 useless extension candidates. Maximal degree in co-relation 1145. Up to 74 conditions per place. [2021-10-15 20:08:29,613 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 61 selfloop transitions, 52 changer transitions 0/122 dead transitions. [2021-10-15 20:08:29,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 1341 flow [2021-10-15 20:08:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:08:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-15 20:08:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2021-10-15 20:08:29,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4323529411764706 [2021-10-15 20:08:29,615 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 147 transitions. [2021-10-15 20:08:29,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 147 transitions. [2021-10-15 20:08:29,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:29,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 147 transitions. [2021-10-15 20:08:29,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:29,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:29,618 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:29,618 INFO L186 Difference]: Start difference. First operand has 75 places, 81 transitions, 779 flow. Second operand 10 states and 147 transitions. [2021-10-15 20:08:29,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 1341 flow [2021-10-15 20:08:29,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 1324 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-10-15 20:08:29,631 INFO L242 Difference]: Finished difference. Result has 88 places, 106 transitions, 1245 flow [2021-10-15 20:08:29,631 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1245, PETRI_PLACES=88, PETRI_TRANSITIONS=106} [2021-10-15 20:08:29,631 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2021-10-15 20:08:29,632 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 106 transitions, 1245 flow [2021-10-15 20:08:29,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:29,632 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:29,632 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:29,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:29,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:08:29,845 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:29,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:29,845 INFO L82 PathProgramCache]: Analyzing trace with hash 38054995, now seen corresponding path program 1 times [2021-10-15 20:08:29,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:29,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985069596] [2021-10-15 20:08:29,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:29,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:29,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:29,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114463425] [2021-10-15 20:08:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:29,856 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:29,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:29,868 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:29,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-15 20:08:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:08:30,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-15 20:08:30,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:30,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985069596] [2021-10-15 20:08:30,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:30,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114463425] [2021-10-15 20:08:30,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114463425] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:30,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:30,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:08:30,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010721611] [2021-10-15 20:08:30,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:30,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:30,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:30,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2021-10-15 20:08:30,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 106 transitions, 1245 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:30,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:30,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2021-10-15 20:08:30,252 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:36,279 INFO L129 PetriNetUnfolder]: 48/269 cut-off events. [2021-10-15 20:08:36,279 INFO L130 PetriNetUnfolder]: For 1968/1968 co-relation queries the response was YES. [2021-10-15 20:08:36,281 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1386 conditions, 269 events. 48/269 cut-off events. For 1968/1968 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1587 event pairs, 0 based on Foata normal form. 3/272 useless extension candidates. Maximal degree in co-relation 1352. Up to 64 conditions per place. [2021-10-15 20:08:36,283 INFO L132 encePairwiseOnDemand]: 22/34 looper letters, 14 selfloop transitions, 86 changer transitions 1/110 dead transitions. [2021-10-15 20:08:36,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 110 transitions, 1481 flow [2021-10-15 20:08:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:08:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:08:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2021-10-15 20:08:36,285 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3758169934640523 [2021-10-15 20:08:36,285 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 115 transitions. [2021-10-15 20:08:36,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 115 transitions. [2021-10-15 20:08:36,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:36,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 115 transitions. [2021-10-15 20:08:36,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 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 20:08:36,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,288 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,288 INFO L186 Difference]: Start difference. First operand has 88 places, 106 transitions, 1245 flow. Second operand 9 states and 115 transitions. [2021-10-15 20:08:36,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 110 transitions, 1481 flow [2021-10-15 20:08:36,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 1377 flow, removed 52 selfloop flow, removed 0 redundant places. [2021-10-15 20:08:36,306 INFO L242 Difference]: Finished difference. Result has 99 places, 108 transitions, 1453 flow [2021-10-15 20:08:36,306 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2021-10-15 20:08:36,306 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2021-10-15 20:08:36,307 INFO L470 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 1453 flow [2021-10-15 20:08:36,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,307 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:36,307 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:36,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:36,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-15 20:08:36,533 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:36,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:36,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1461153292, now seen corresponding path program 2 times [2021-10-15 20:08:36,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:36,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423548994] [2021-10-15 20:08:36,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:36,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:36,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:36,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066151191] [2021-10-15 20:08:36,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:08:36,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:36,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:36,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:36,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-15 20:08:36,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:08:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:08:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:08:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:36,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:36,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423548994] [2021-10-15 20:08:36,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:08:36,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066151191] [2021-10-15 20:08:36,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066151191] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:36,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:36,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 20:08:36,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299673081] [2021-10-15 20:08:36,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:36,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:36,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 34 [2021-10-15 20:08:36,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:08:36,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 34 [2021-10-15 20:08:36,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:08:36,880 INFO L129 PetriNetUnfolder]: 9/144 cut-off events. [2021-10-15 20:08:36,880 INFO L130 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2021-10-15 20:08:36,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 144 events. 9/144 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 737 event pairs, 0 based on Foata normal form. 12/156 useless extension candidates. Maximal degree in co-relation 653. Up to 21 conditions per place. [2021-10-15 20:08:36,882 INFO L132 encePairwiseOnDemand]: 30/34 looper letters, 6 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2021-10-15 20:08:36,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 66 transitions, 812 flow [2021-10-15 20:08:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:08:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 20:08:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2021-10-15 20:08:36,884 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-10-15 20:08:36,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2021-10-15 20:08:36,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2021-10-15 20:08:36,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:08:36,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2021-10-15 20:08:36,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,886 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,886 INFO L186 Difference]: Start difference. First operand has 99 places, 108 transitions, 1453 flow. Second operand 6 states and 153 transitions. [2021-10-15 20:08:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 66 transitions, 812 flow [2021-10-15 20:08:36,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 66 transitions, 629 flow, removed 7 selfloop flow, removed 20 redundant places. [2021-10-15 20:08:36,900 INFO L242 Difference]: Finished difference. Result has 81 places, 66 transitions, 617 flow [2021-10-15 20:08:36,900 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2021-10-15 20:08:36,900 INFO L334 CegarLoopForPetriNet]: 21 programPoint places, 60 predicate places. [2021-10-15 20:08:36,901 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 617 flow [2021-10-15 20:08:36,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:08:36,901 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:08:36,901 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:36,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:37,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:37,114 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:08:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:37,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1948915952, now seen corresponding path program 2 times [2021-10-15 20:08:37,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:37,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087291274] [2021-10-15 20:08:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:37,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:37,128 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:08:37,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93823986] [2021-10-15 20:08:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:08:37,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:37,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:37,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-15 20:08:37,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:08:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-15 20:08:37,340 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:08:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:08:37,376 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:08:37,376 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:08:37,377 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:08:37,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:08:37,379 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:08:37,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-15 20:08:37,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-15 20:08:37,585 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:08:37,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:08:37 BoogieIcfgContainer [2021-10-15 20:08:37,619 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:08:37,619 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:08:37,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:08:37,620 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:08:37,620 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:06" (3/4) ... [2021-10-15 20:08:37,622 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 20:08:37,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:08:37,666 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:08:37,667 INFO L168 Benchmark]: Toolchain (without parser) took 31866.85 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 87.8 MB in the beginning and 82.6 MB in the end (delta: 5.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,667 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 53.6 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:37,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 339.76 ms. Allocated memory is still 119.5 MB. Free memory was 87.8 MB in the beginning and 95.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.51 ms. Allocated memory is still 119.5 MB. Free memory was 95.5 MB in the beginning and 94.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:08:37,669 INFO L168 Benchmark]: Boogie Preprocessor took 41.00 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 93.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,669 INFO L168 Benchmark]: RCFGBuilder took 446.30 ms. Allocated memory is still 119.5 MB. Free memory was 92.5 MB in the beginning and 82.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,670 INFO L168 Benchmark]: TraceAbstraction took 30945.26 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 81.5 MB in the beginning and 85.8 MB in the end (delta: -4.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,670 INFO L168 Benchmark]: Witness Printer took 46.49 ms. Allocated memory is still 144.7 MB. Free memory was 84.7 MB in the beginning and 82.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:08:37,672 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 83.9 MB. Free memory was 53.6 MB in the beginning and 53.6 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 339.76 ms. Allocated memory is still 119.5 MB. Free memory was 87.8 MB in the beginning and 95.5 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.51 ms. Allocated memory is still 119.5 MB. Free memory was 95.5 MB in the beginning and 94.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.00 ms. Allocated memory is still 119.5 MB. Free memory was 94.1 MB in the beginning and 93.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 446.30 ms. Allocated memory is still 119.5 MB. Free memory was 92.5 MB in the beginning and 82.0 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 30945.26 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 81.5 MB in the beginning and 85.8 MB in the end (delta: -4.3 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. * Witness Printer took 46.49 ms. Allocated memory is still 144.7 MB. Free memory was 84.7 MB in the beginning and 82.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [counter=0] [L21] int x, y; [L22] long long a, b, p, q; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) VAL [counter=0] [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=1] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=1] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND TRUE counter++<2 [L12] COND FALSE !(!(cond)) VAL [counter=2] [L36] COND FALSE !(!(a != 0 && b != 0)) VAL [counter=2] [L39] COND TRUE a % 2 == 0 && b % 2 == 0 [L40] a = a / 2 [L41] b = b / 2 [L42] p = 4 * p VAL [counter=2] [L33] EXPR counter++ VAL [counter=3] [L33] COND FALSE !(counter++<2) [L12] COND TRUE !(cond) VAL [counter=3] [L14] reach_error() VAL [counter=3] - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 8.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 30812.9ms, OverallIterations: 15, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 21449.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 86 SDtfs, 437 SDslu, 162 SDs, 0 SdLazy, 733 SolverSat, 163 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 17506.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3592.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1453occurred in iteration=13, InterpolantAutomatonStates: 97, 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: 88.2ms SsaConstructionTime, 354.9ms SatisfiabilityAnalysisTime, 3937.8ms InterpolantComputationTime, 209 NumberOfCodeBlocks, 209 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 176 ConstructedInterpolants, 3 QuantifiedInterpolants, 1235 SizeOfPredicates, 84 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 21/37 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 20:08:37,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1dbc0b6-378e-45e7-a540-7099baa9cdf8/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...