./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.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_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/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_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/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_a8054545-42cc-4e40-a320-f4b225448b8f/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 fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:26:25,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:26:25,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:26:25,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:26:25,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:26:25,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:26:25,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:26:25,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:26:25,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:26:25,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:26:25,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:26:25,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:26:25,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:26:25,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:26:25,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:26:25,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:26:25,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:26:25,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:26:25,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:26:25,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:26:25,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:26:25,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:26:25,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:26:25,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:26:25,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:26:25,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:26:25,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:26:25,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:26:25,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:26:25,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:26:25,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:26:25,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:26:25,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:26:25,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:26:25,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:26:25,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:26:25,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:26:25,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:26:25,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:26:25,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:26:25,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:26:25,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 20:26:25,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:26:25,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:26:25,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:26:25,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:26:25,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:26:25,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:26:25,273 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:26:25,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:26:25,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:26:25,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:26:25,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:26:25,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:26:25,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 20:26:25,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:26:25,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 20:26:25,276 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:26:25,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 20:26:25,276 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:26:25,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 20:26:25,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:26:25,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:26:25,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:26:25,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:26:25,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:26:25,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:26:25,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 20:26:25,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:26:25,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:26:25,279 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 20:26:25,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 20:26:25,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 20:26:25,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:26:25,280 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_a8054545-42cc-4e40-a320-f4b225448b8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbde2b4d8590a43f5f4c36a2fa025463c4b5fc0a [2021-10-15 20:26:25,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:26:25,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:26:25,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:26:25,664 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:26:25,665 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:26:25,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-10-15 20:26:25,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/data/93aa7ea39/eb18f01aeeea4f8698c647f29090a387/FLAG3f2f7f732 [2021-10-15 20:26:26,299 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:26:26,303 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2021-10-15 20:26:26,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/data/93aa7ea39/eb18f01aeeea4f8698c647f29090a387/FLAG3f2f7f732 [2021-10-15 20:26:26,637 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/data/93aa7ea39/eb18f01aeeea4f8698c647f29090a387 [2021-10-15 20:26:26,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:26:26,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 20:26:26,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:26:26,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:26:26,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:26:26,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6352a222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26, skipping insertion in model container [2021-10-15 20:26:26,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:26:26,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:26:26,887 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_a8054545-42cc-4e40-a320-f4b225448b8f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2021-10-15 20:26:26,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:26:26,913 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:26:26,926 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_a8054545-42cc-4e40-a320-f4b225448b8f/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c[597,610] [2021-10-15 20:26:26,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:26:26,948 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:26:26,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26 WrapperNode [2021-10-15 20:26:26,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:26:26,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 20:26:26,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 20:26:26,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 20:26:26,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 20:26:26,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:26:26,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:26:26,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:26:26,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:26,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:27,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:27,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:27,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:27,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:26:27,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:26:27,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:26:27,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:26:27,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (1/1) ... [2021-10-15 20:26:27,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:26:27,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:27,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:26:27,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:26:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:26:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:26:27,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:26:27,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:26:27,305 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:26:27,306 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-15 20:26:27,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:27 BoogieIcfgContainer [2021-10-15 20:26:27,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:26:27,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:26:27,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:26:27,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:26:27,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:26:26" (1/3) ... [2021-10-15 20:26:27,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6000a0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:26:27, skipping insertion in model container [2021-10-15 20:26:27,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:26:26" (2/3) ... [2021-10-15 20:26:27,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6000a0ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:26:27, skipping insertion in model container [2021-10-15 20:26:27,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:27" (3/3) ... [2021-10-15 20:26:27,324 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2021-10-15 20:26:27,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:26:27,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-15 20:26:27,377 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:26:27,384 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 20:26:27,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-15 20:26:27,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 28 transitions, 56 flow [2021-10-15 20:26:27,420 INFO L129 PetriNetUnfolder]: 8/28 cut-off events. [2021-10-15 20:26:27,421 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:27,423 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 28 events. 8/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 20:26:27,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 28 transitions, 56 flow [2021-10-15 20:26:27,428 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 17 places, 23 transitions, 46 flow [2021-10-15 20:26:27,433 INFO L129 PetriNetUnfolder]: 6/19 cut-off events. [2021-10-15 20:26:27,433 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:27,433 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:27,434 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:27,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1180944530, now seen corresponding path program 1 times [2021-10-15 20:26:27,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:27,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709018774] [2021-10-15 20:26:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:27,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:27,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:27,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709018774] [2021-10-15 20:26:27,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709018774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:27,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:27,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 20:26:27,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459665532] [2021-10-15 20:26:27,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 20:26:27,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:27,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 20:26:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 20:26:27,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 28 [2021-10-15 20:26:27,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 23 transitions, 46 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:27,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 28 [2021-10-15 20:26:27,666 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:27,675 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2021-10-15 20:26:27,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:27,676 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 18 events. 2/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 4/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2021-10-15 20:26:27,677 INFO L132 encePairwiseOnDemand]: 23/28 looper letters, 0 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2021-10-15 20:26:27,677 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 18 transitions, 36 flow [2021-10-15 20:26:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 20:26:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 20:26:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 49 transitions. [2021-10-15 20:26:27,721 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-10-15 20:26:27,722 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 49 transitions. [2021-10-15 20:26:27,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 49 transitions. [2021-10-15 20:26:27,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:27,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 49 transitions. [2021-10-15 20:26:27,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,749 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,752 INFO L186 Difference]: Start difference. First operand has 17 places, 23 transitions, 46 flow. Second operand 2 states and 49 transitions. [2021-10-15 20:26:27,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 18 transitions, 36 flow [2021-10-15 20:26:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 18 transitions, 36 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:26:27,757 INFO L242 Difference]: Finished difference. Result has 18 places, 18 transitions, 36 flow [2021-10-15 20:26:27,759 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=18, PETRI_TRANSITIONS=18} [2021-10-15 20:26:27,784 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2021-10-15 20:26:27,784 INFO L470 AbstractCegarLoop]: Abstraction has has 18 places, 18 transitions, 36 flow [2021-10-15 20:26:27,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:27,785 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:27,785 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:27,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:26:27,786 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:27,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:27,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-10-15 20:26:27,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:27,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742545563] [2021-10-15 20:26:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:27,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:27,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:27,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590431082] [2021-10-15 20:26:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:27,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:27,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:27,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:26:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:27,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-15 20:26:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:28,174 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 20:26:28,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:28,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742545563] [2021-10-15 20:26:28,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:28,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590431082] [2021-10-15 20:26:28,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590431082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:28,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:26:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851910744] [2021-10-15 20:26:28,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:26:28,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:26:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:26:28,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 20:26:28,190 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 18 transitions, 36 flow. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,190 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:28,190 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 20:26:28,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:28,290 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-10-15 20:26:28,294 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 20:26:28,294 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 27 events. 3/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 49. Up to 14 conditions per place. [2021-10-15 20:26:28,296 INFO L132 encePairwiseOnDemand]: 22/28 looper letters, 15 selfloop transitions, 5 changer transitions 2/27 dead transitions. [2021-10-15 20:26:28,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 27 transitions, 98 flow [2021-10-15 20:26:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:26:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 20:26:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2021-10-15 20:26:28,302 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2021-10-15 20:26:28,303 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2021-10-15 20:26:28,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2021-10-15 20:26:28,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:28,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2021-10-15 20:26:28,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,311 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,311 INFO L186 Difference]: Start difference. First operand has 18 places, 18 transitions, 36 flow. Second operand 5 states and 64 transitions. [2021-10-15 20:26:28,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 27 transitions, 98 flow [2021-10-15 20:26:28,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 27 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:26:28,317 INFO L242 Difference]: Finished difference. Result has 23 places, 22 transitions, 67 flow [2021-10-15 20:26:28,317 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=67, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2021-10-15 20:26:28,317 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 6 predicate places. [2021-10-15 20:26:28,318 INFO L470 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 67 flow [2021-10-15 20:26:28,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:28,319 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:28,319 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:28,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:28,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:28,536 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:28,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2039286562, now seen corresponding path program 1 times [2021-10-15 20:26:28,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:28,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312541376] [2021-10-15 20:26:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:28,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:28,555 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:28,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223672993] [2021-10-15 20:26:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:28,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:28,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:28,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:28,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:26:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:28,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 20:26:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:29,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:29,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312541376] [2021-10-15 20:26:29,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:29,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223672993] [2021-10-15 20:26:29,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223672993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:29,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:29,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-10-15 20:26:29,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145324913] [2021-10-15 20:26:29,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:26:29,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:26:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:26:29,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 28 [2021-10-15 20:26:29,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 67 flow. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:29,246 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 28 [2021-10-15 20:26:29,246 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:29,567 INFO L129 PetriNetUnfolder]: 3/36 cut-off events. [2021-10-15 20:26:29,567 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-10-15 20:26:29,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 36 events. 3/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 2/33 useless extension candidates. Maximal degree in co-relation 80. Up to 12 conditions per place. [2021-10-15 20:26:29,568 INFO L132 encePairwiseOnDemand]: 18/28 looper letters, 13 selfloop transitions, 6 changer transitions 10/33 dead transitions. [2021-10-15 20:26:29,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 153 flow [2021-10-15 20:26:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:26:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-15 20:26:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2021-10-15 20:26:29,571 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2021-10-15 20:26:29,571 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 94 transitions. [2021-10-15 20:26:29,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 94 transitions. [2021-10-15 20:26:29,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:29,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 94 transitions. [2021-10-15 20:26:29,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,576 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,576 INFO L186 Difference]: Start difference. First operand has 23 places, 22 transitions, 67 flow. Second operand 9 states and 94 transitions. [2021-10-15 20:26:29,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 153 flow [2021-10-15 20:26:29,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 33 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 20:26:29,580 INFO L242 Difference]: Finished difference. Result has 33 places, 21 transitions, 82 flow [2021-10-15 20:26:29,580 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2021-10-15 20:26:29,580 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 16 predicate places. [2021-10-15 20:26:29,581 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 82 flow [2021-10-15 20:26:29,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:29,581 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:29,581 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:29,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:29,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:29,795 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2037439520, now seen corresponding path program 1 times [2021-10-15 20:26:29,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:29,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383187594] [2021-10-15 20:26:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:29,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:29,813 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:29,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871028913] [2021-10-15 20:26:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:29,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:29,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:29,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:29,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:26:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 20:26:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:30,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383187594] [2021-10-15 20:26:30,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871028913] [2021-10-15 20:26:30,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871028913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:30,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:30,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 20:26:30,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79210706] [2021-10-15 20:26:30,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:26:30,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:26:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:26:30,081 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 20:26:30,081 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 21 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,081 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:30,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 20:26:30,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:30,190 INFO L129 PetriNetUnfolder]: 3/36 cut-off events. [2021-10-15 20:26:30,191 INFO L130 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2021-10-15 20:26:30,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 36 events. 3/36 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 23 event pairs, 0 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 92. Up to 14 conditions per place. [2021-10-15 20:26:30,192 INFO L132 encePairwiseOnDemand]: 21/28 looper letters, 20 selfloop transitions, 8 changer transitions 2/35 dead transitions. [2021-10-15 20:26:30,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 182 flow [2021-10-15 20:26:30,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:26:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 20:26:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2021-10-15 20:26:30,194 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.42410714285714285 [2021-10-15 20:26:30,194 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 95 transitions. [2021-10-15 20:26:30,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 95 transitions. [2021-10-15 20:26:30,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:30,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 95 transitions. [2021-10-15 20:26:30,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,198 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,198 INFO L186 Difference]: Start difference. First operand has 33 places, 21 transitions, 82 flow. Second operand 8 states and 95 transitions. [2021-10-15 20:26:30,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 182 flow [2021-10-15 20:26:30,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 158 flow, removed 6 selfloop flow, removed 8 redundant places. [2021-10-15 20:26:30,201 INFO L242 Difference]: Finished difference. Result has 33 places, 26 transitions, 115 flow [2021-10-15 20:26:30,201 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2021-10-15 20:26:30,202 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 16 predicate places. [2021-10-15 20:26:30,202 INFO L470 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 115 flow [2021-10-15 20:26:30,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,202 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:30,202 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:30,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:30,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:30,408 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash -878006574, now seen corresponding path program 1 times [2021-10-15 20:26:30,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:30,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091040999] [2021-10-15 20:26:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:30,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:30,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:30,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077036855] [2021-10-15 20:26:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:30,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:30,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:30,425 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:30,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:26:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:30,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-15 20:26:30,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:30,815 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 20:26:30,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091040999] [2021-10-15 20:26:30,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:30,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077036855] [2021-10-15 20:26:30,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077036855] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:30,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-10-15 20:26:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055212978] [2021-10-15 20:26:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:26:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:30,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:26:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:26:30,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 20:26:30,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 115 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:30,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:30,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 20:26:30,821 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:31,020 INFO L129 PetriNetUnfolder]: 3/35 cut-off events. [2021-10-15 20:26:31,020 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-10-15 20:26:31,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 35 events. 3/35 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 1/31 useless extension candidates. Maximal degree in co-relation 100. Up to 14 conditions per place. [2021-10-15 20:26:31,023 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 16 selfloop transitions, 10 changer transitions 4/35 dead transitions. [2021-10-15 20:26:31,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 199 flow [2021-10-15 20:26:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:26:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-15 20:26:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2021-10-15 20:26:31,030 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2021-10-15 20:26:31,030 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 119 transitions. [2021-10-15 20:26:31,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 119 transitions. [2021-10-15 20:26:31,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:31,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 119 transitions. [2021-10-15 20:26:31,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:31,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:31,037 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:31,037 INFO L186 Difference]: Start difference. First operand has 33 places, 26 transitions, 115 flow. Second operand 11 states and 119 transitions. [2021-10-15 20:26:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 199 flow [2021-10-15 20:26:31,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 187 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 20:26:31,043 INFO L242 Difference]: Finished difference. Result has 45 places, 28 transitions, 145 flow [2021-10-15 20:26:31,043 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=145, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2021-10-15 20:26:31,044 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 28 predicate places. [2021-10-15 20:26:31,044 INFO L470 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 145 flow [2021-10-15 20:26:31,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:31,044 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:31,045 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:31,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:31,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:31,259 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:31,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1901094894, now seen corresponding path program 1 times [2021-10-15 20:26:31,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:31,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248031641] [2021-10-15 20:26:31,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:31,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:31,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:31,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22431067] [2021-10-15 20:26:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:31,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:31,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:31,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:31,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:26:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:31,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-15 20:26:31,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:32,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:32,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248031641] [2021-10-15 20:26:32,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:32,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22431067] [2021-10-15 20:26:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22431067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:32,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:32,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:26:32,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839733839] [2021-10-15 20:26:32,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:26:32,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:32,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:26:32,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:26:32,107 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2021-10-15 20:26:32,107 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 145 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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 20:26:32,107 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:32,107 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2021-10-15 20:26:32,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:32,420 INFO L129 PetriNetUnfolder]: 3/37 cut-off events. [2021-10-15 20:26:32,420 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-10-15 20:26:32,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 37 events. 3/37 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 3/39 useless extension candidates. Maximal degree in co-relation 130. Up to 14 conditions per place. [2021-10-15 20:26:32,421 INFO L132 encePairwiseOnDemand]: 17/28 looper letters, 19 selfloop transitions, 14 changer transitions 0/36 dead transitions. [2021-10-15 20:26:32,421 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 36 transitions, 251 flow [2021-10-15 20:26:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:26:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:26:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 114 transitions. [2021-10-15 20:26:32,423 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3131868131868132 [2021-10-15 20:26:32,423 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 114 transitions. [2021-10-15 20:26:32,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 114 transitions. [2021-10-15 20:26:32,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:32,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 114 transitions. [2021-10-15 20:26:32,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 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 20:26:32,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:32,426 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:32,426 INFO L186 Difference]: Start difference. First operand has 45 places, 28 transitions, 145 flow. Second operand 13 states and 114 transitions. [2021-10-15 20:26:32,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 36 transitions, 251 flow [2021-10-15 20:26:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 36 transitions, 227 flow, removed 4 selfloop flow, removed 7 redundant places. [2021-10-15 20:26:32,431 INFO L242 Difference]: Finished difference. Result has 51 places, 31 transitions, 189 flow [2021-10-15 20:26:32,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=189, PETRI_PLACES=51, PETRI_TRANSITIONS=31} [2021-10-15 20:26:32,431 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 34 predicate places. [2021-10-15 20:26:32,432 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 31 transitions, 189 flow [2021-10-15 20:26:32,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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 20:26:32,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:32,432 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:32,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:32,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-15 20:26:32,647 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1899247852, now seen corresponding path program 2 times [2021-10-15 20:26:32,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:32,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917677520] [2021-10-15 20:26:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:32,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:32,661 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:32,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022631590] [2021-10-15 20:26:32,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:32,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:32,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:32,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:26:32,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 20:26:32,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:33,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:33,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917677520] [2021-10-15 20:26:33,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:33,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022631590] [2021-10-15 20:26:33,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022631590] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:33,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:33,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:26:33,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236221054] [2021-10-15 20:26:33,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:26:33,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:26:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:26:33,417 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2021-10-15 20:26:33,417 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 31 transitions, 189 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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 20:26:33,417 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:33,417 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2021-10-15 20:26:33,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:34,022 INFO L129 PetriNetUnfolder]: 3/46 cut-off events. [2021-10-15 20:26:34,023 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2021-10-15 20:26:34,023 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 46 events. 3/46 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 1/46 useless extension candidates. Maximal degree in co-relation 173. Up to 18 conditions per place. [2021-10-15 20:26:34,024 INFO L132 encePairwiseOnDemand]: 18/28 looper letters, 24 selfloop transitions, 15 changer transitions 0/42 dead transitions. [2021-10-15 20:26:34,024 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 42 transitions, 323 flow [2021-10-15 20:26:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:26:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-15 20:26:34,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 121 transitions. [2021-10-15 20:26:34,028 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3086734693877551 [2021-10-15 20:26:34,029 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 121 transitions. [2021-10-15 20:26:34,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 121 transitions. [2021-10-15 20:26:34,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:34,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 121 transitions. [2021-10-15 20:26:34,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.642857142857142) internal successors, (121), 14 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:34,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:34,032 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:34,033 INFO L186 Difference]: Start difference. First operand has 51 places, 31 transitions, 189 flow. Second operand 14 states and 121 transitions. [2021-10-15 20:26:34,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 42 transitions, 323 flow [2021-10-15 20:26:34,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 295 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-10-15 20:26:34,039 INFO L242 Difference]: Finished difference. Result has 58 places, 36 transitions, 244 flow [2021-10-15 20:26:34,039 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=36} [2021-10-15 20:26:34,040 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 41 predicate places. [2021-10-15 20:26:34,040 INFO L470 AbstractCegarLoop]: Abstraction has has 58 places, 36 transitions, 244 flow [2021-10-15 20:26:34,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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 20:26:34,041 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:34,041 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:34,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:34,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:34,252 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1411305246, now seen corresponding path program 2 times [2021-10-15 20:26:34,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:34,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935037565] [2021-10-15 20:26:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:34,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:34,270 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:34,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397155307] [2021-10-15 20:26:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:26:34,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:34,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:34,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:26:34,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:26:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:34,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-15 20:26:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:34,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:34,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935037565] [2021-10-15 20:26:34,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:34,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397155307] [2021-10-15 20:26:34,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397155307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:34,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:34,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-10-15 20:26:34,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641355404] [2021-10-15 20:26:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:26:34,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:34,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:26:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:26:34,816 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 20:26:34,816 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 36 transitions, 244 flow. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 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 20:26:34,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:34,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 20:26:34,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:35,038 INFO L129 PetriNetUnfolder]: 3/44 cut-off events. [2021-10-15 20:26:35,039 INFO L130 PetriNetUnfolder]: For 81/81 co-relation queries the response was YES. [2021-10-15 20:26:35,039 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 44 events. 3/44 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 36 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 186. Up to 21 conditions per place. [2021-10-15 20:26:35,040 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 23 selfloop transitions, 11 changer transitions 2/41 dead transitions. [2021-10-15 20:26:35,040 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 41 transitions, 346 flow [2021-10-15 20:26:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:26:35,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:26:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2021-10-15 20:26:35,045 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2021-10-15 20:26:35,046 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 130 transitions. [2021-10-15 20:26:35,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 130 transitions. [2021-10-15 20:26:35,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:35,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 130 transitions. [2021-10-15 20:26:35,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 10.833333333333334) internal successors, (130), 12 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:35,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:35,053 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:35,053 INFO L186 Difference]: Start difference. First operand has 58 places, 36 transitions, 244 flow. Second operand 12 states and 130 transitions. [2021-10-15 20:26:35,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 41 transitions, 346 flow [2021-10-15 20:26:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 41 transitions, 312 flow, removed 8 selfloop flow, removed 8 redundant places. [2021-10-15 20:26:35,061 INFO L242 Difference]: Finished difference. Result has 64 places, 36 transitions, 241 flow [2021-10-15 20:26:35,062 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=241, PETRI_PLACES=64, PETRI_TRANSITIONS=36} [2021-10-15 20:26:35,062 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 47 predicate places. [2021-10-15 20:26:35,062 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 36 transitions, 241 flow [2021-10-15 20:26:35,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 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 20:26:35,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:35,064 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:35,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:35,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:35,291 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash -893844384, now seen corresponding path program 3 times [2021-10-15 20:26:35,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:35,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130403442] [2021-10-15 20:26:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:35,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:35,305 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:35,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779732913] [2021-10-15 20:26:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:26:35,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:35,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:35,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:35,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:26:35,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-15 20:26:35,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-15 20:26:35,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-15 20:26:36,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:36,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130403442] [2021-10-15 20:26:36,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:36,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779732913] [2021-10-15 20:26:36,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779732913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:36,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:36,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-10-15 20:26:36,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982788400] [2021-10-15 20:26:36,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:26:36,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:26:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:26:36,340 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2021-10-15 20:26:36,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 36 transitions, 241 flow. Second operand has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:36,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:36,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2021-10-15 20:26:36,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:37,296 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2021-10-15 20:26:37,296 INFO L130 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2021-10-15 20:26:37,297 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 40 events. 3/40 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 1/40 useless extension candidates. Maximal degree in co-relation 173. Up to 11 conditions per place. [2021-10-15 20:26:37,297 INFO L132 encePairwiseOnDemand]: 16/28 looper letters, 7 selfloop transitions, 26 changer transitions 0/35 dead transitions. [2021-10-15 20:26:37,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 35 transitions, 301 flow [2021-10-15 20:26:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-15 20:26:37,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-15 20:26:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 97 transitions. [2021-10-15 20:26:37,299 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2664835164835165 [2021-10-15 20:26:37,299 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 97 transitions. [2021-10-15 20:26:37,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 97 transitions. [2021-10-15 20:26:37,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:37,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 97 transitions. [2021-10-15 20:26:37,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:37,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:37,301 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:37,301 INFO L186 Difference]: Start difference. First operand has 64 places, 36 transitions, 241 flow. Second operand 13 states and 97 transitions. [2021-10-15 20:26:37,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 35 transitions, 301 flow [2021-10-15 20:26:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 35 transitions, 275 flow, removed 5 selfloop flow, removed 8 redundant places. [2021-10-15 20:26:37,306 INFO L242 Difference]: Finished difference. Result has 64 places, 34 transitions, 255 flow [2021-10-15 20:26:37,306 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=255, PETRI_PLACES=64, PETRI_TRANSITIONS=34} [2021-10-15 20:26:37,306 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 47 predicate places. [2021-10-15 20:26:37,306 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 34 transitions, 255 flow [2021-10-15 20:26:37,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.461538461538462) internal successors, (97), 13 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:37,306 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:37,307 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:37,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-15 20:26:37,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-15 20:26:37,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash 870904144, now seen corresponding path program 1 times [2021-10-15 20:26:37,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:37,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120273785] [2021-10-15 20:26:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:37,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:37,524 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:37,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44915643] [2021-10-15 20:26:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:37,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:37,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:37,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:26:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:26:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-15 20:26:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:26:38,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:38,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120273785] [2021-10-15 20:26:38,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:38,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44915643] [2021-10-15 20:26:38,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44915643] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:26:38,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:26:38,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-10-15 20:26:38,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806252057] [2021-10-15 20:26:38,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:26:38,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:38,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:26:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:26:38,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 28 [2021-10-15 20:26:38,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 34 transitions, 255 flow. Second operand has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:38,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:38,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 28 [2021-10-15 20:26:38,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:38,809 INFO L129 PetriNetUnfolder]: 4/48 cut-off events. [2021-10-15 20:26:38,809 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2021-10-15 20:26:38,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 48 events. 4/48 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 1/47 useless extension candidates. Maximal degree in co-relation 233. Up to 19 conditions per place. [2021-10-15 20:26:38,810 INFO L132 encePairwiseOnDemand]: 21/28 looper letters, 24 selfloop transitions, 16 changer transitions 2/46 dead transitions. [2021-10-15 20:26:38,810 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 46 transitions, 443 flow [2021-10-15 20:26:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:26:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-15 20:26:38,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 158 transitions. [2021-10-15 20:26:38,821 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2021-10-15 20:26:38,821 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 158 transitions. [2021-10-15 20:26:38,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 158 transitions. [2021-10-15 20:26:38,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:38,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 158 transitions. [2021-10-15 20:26:38,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.533333333333333) internal successors, (158), 15 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:38,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:38,824 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 28.0) internal successors, (448), 16 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:38,824 INFO L186 Difference]: Start difference. First operand has 64 places, 34 transitions, 255 flow. Second operand 15 states and 158 transitions. [2021-10-15 20:26:38,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 46 transitions, 443 flow [2021-10-15 20:26:38,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 46 transitions, 368 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-10-15 20:26:38,829 INFO L242 Difference]: Finished difference. Result has 70 places, 38 transitions, 288 flow [2021-10-15 20:26:38,830 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=288, PETRI_PLACES=70, PETRI_TRANSITIONS=38} [2021-10-15 20:26:38,830 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 53 predicate places. [2021-10-15 20:26:38,830 INFO L470 AbstractCegarLoop]: Abstraction has has 70 places, 38 transitions, 288 flow [2021-10-15 20:26:38,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.642857142857142) internal successors, (135), 14 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:38,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 20:26:38,831 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:26:38,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:39,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-15 20:26:39,036 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 20:26:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:26:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash 284098130, now seen corresponding path program 3 times [2021-10-15 20:26:39,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:26:39,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867038861] [2021-10-15 20:26:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:26:39,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:26:39,046 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 20:26:39,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184873097] [2021-10-15 20:26:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-15 20:26:39,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:26:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:26:39,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:26:39,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:26:39,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-15 20:26:39,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:26:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-15 20:26:39,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:26:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-15 20:26:40,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:26:40,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867038861] [2021-10-15 20:26:40,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 20:26:40,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184873097] [2021-10-15 20:26:40,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184873097] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:26:40,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:26:40,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 20:26:40,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562043354] [2021-10-15 20:26:40,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:26:40,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:26:40,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:26:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:26:40,073 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 28 [2021-10-15 20:26:40,073 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 38 transitions, 288 flow. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:40,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 20:26:40,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 28 [2021-10-15 20:26:40,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 20:26:40,465 INFO L129 PetriNetUnfolder]: 4/44 cut-off events. [2021-10-15 20:26:40,465 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2021-10-15 20:26:40,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 44 events. 4/44 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 212. Up to 9 conditions per place. [2021-10-15 20:26:40,466 INFO L132 encePairwiseOnDemand]: 16/28 looper letters, 0 selfloop transitions, 0 changer transitions 37/37 dead transitions. [2021-10-15 20:26:40,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 37 transitions, 360 flow [2021-10-15 20:26:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:26:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-15 20:26:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 89 transitions. [2021-10-15 20:26:40,468 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.2648809523809524 [2021-10-15 20:26:40,468 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 89 transitions. [2021-10-15 20:26:40,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 89 transitions. [2021-10-15 20:26:40,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 20:26:40,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 89 transitions. [2021-10-15 20:26:40,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 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 20:26:40,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:40,471 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:40,471 INFO L186 Difference]: Start difference. First operand has 70 places, 38 transitions, 288 flow. Second operand 12 states and 89 transitions. [2021-10-15 20:26:40,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 37 transitions, 360 flow [2021-10-15 20:26:40,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 37 transitions, 306 flow, removed 12 selfloop flow, removed 11 redundant places. [2021-10-15 20:26:40,475 INFO L242 Difference]: Finished difference. Result has 67 places, 0 transitions, 0 flow [2021-10-15 20:26:40,475 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=67, PETRI_TRANSITIONS=0} [2021-10-15 20:26:40,475 INFO L334 CegarLoopForPetriNet]: 17 programPoint places, 50 predicate places. [2021-10-15 20:26:40,476 INFO L470 AbstractCegarLoop]: Abstraction has has 67 places, 0 transitions, 0 flow [2021-10-15 20:26:40,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 20:26:40,478 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:26:40,479 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 20:26:40,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:26:40,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-15 20:26:40,701 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:26:40,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:26:40 BoogieIcfgContainer [2021-10-15 20:26:40,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:26:40,705 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:26:40,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:26:40,706 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:26:40,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:26:27" (3/4) ... [2021-10-15 20:26:40,708 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 20:26:40,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-15 20:26:40,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 20:26:40,721 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:40,722 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 20:26:40,759 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 20:26:40,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:26:40,765 INFO L168 Benchmark]: Toolchain (without parser) took 14122.31 ms. Allocated memory was 92.3 MB in the beginning and 148.9 MB in the end (delta: 56.6 MB). Free memory was 57.6 MB in the beginning and 97.5 MB in the end (delta: -39.9 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,766 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 32.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:26:40,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.17 ms. Allocated memory is still 92.3 MB. Free memory was 57.4 MB in the beginning and 67.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,767 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.15 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:26:40,768 INFO L168 Benchmark]: Boogie Preprocessor took 24.91 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 64.5 MB in the end (delta: 998.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,768 INFO L168 Benchmark]: RCFGBuilder took 305.59 ms. Allocated memory is still 92.3 MB. Free memory was 64.5 MB in the beginning and 54.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,769 INFO L168 Benchmark]: TraceAbstraction took 13387.88 ms. Allocated memory was 92.3 MB in the beginning and 148.9 MB in the end (delta: 56.6 MB). Free memory was 54.1 MB in the beginning and 100.6 MB in the end (delta: -46.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,769 INFO L168 Benchmark]: Witness Printer took 57.86 ms. Allocated memory is still 148.9 MB. Free memory was 100.6 MB in the beginning and 97.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:26:40,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 61.9 MB in the end (delta: 32.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.17 ms. Allocated memory is still 92.3 MB. Free memory was 57.4 MB in the beginning and 67.0 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.15 ms. Allocated memory is still 92.3 MB. Free memory was 67.0 MB in the beginning and 65.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.91 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 64.5 MB in the end (delta: 998.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 305.59 ms. Allocated memory is still 92.3 MB. Free memory was 64.5 MB in the beginning and 54.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13387.88 ms. Allocated memory was 92.3 MB in the beginning and 148.9 MB in the end (delta: 56.6 MB). Free memory was 54.1 MB in the beginning and 100.6 MB in the end (delta: -46.6 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Witness Printer took 57.86 ms. Allocated memory is still 148.9 MB. Free memory was 100.6 MB in the beginning and 97.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 4.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 13326.8ms, OverallIterations: 11, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 3929.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 260 SDslu, 180 SDs, 0 SdLazy, 1116 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 967.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 238 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3715.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=288occurred in iteration=10, InterpolantAutomatonStates: 114, 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: 82.4ms SsaConstructionTime, 316.6ms SatisfiabilityAnalysisTime, 5280.7ms InterpolantComputationTime, 201 NumberOfCodeBlocks, 186 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 190 ConstructedInterpolants, 0 QuantifiedInterpolants, 2693 SizeOfPredicates, 132 NumberOfNonLiveVariables, 949 ConjunctsInSsa, 324 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 41/105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 20:26:40,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8054545-42cc-4e40-a320-f4b225448b8f/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...