./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.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_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/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_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/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_69f06f1f-5a0d-48e7-9b2d-83b534767826/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 3e8b2633622084f06b754f22cb180cb188cb0d4f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:06:38,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:06:38,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:06:38,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:06:38,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:06:38,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:06:38,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:06:38,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:06:38,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:06:38,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:06:38,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:06:38,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:06:38,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:06:38,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:06:38,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:06:38,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:06:38,672 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:06:38,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:06:38,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:06:38,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:06:38,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:06:38,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:06:38,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:06:38,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:06:38,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:06:38,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:06:38,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:06:38,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:06:38,704 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:06:38,705 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:06:38,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:06:38,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:06:38,709 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:06:38,710 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:06:38,711 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:06:38,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:06:38,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:06:38,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:06:38,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:06:38,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:06:38,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:06:38,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:06:38,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:06:38,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:06:38,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:06:38,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:06:38,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:06:38,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:06:38,768 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:06:38,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:06:38,768 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:06:38,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:06:38,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:06:38,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:06:38,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:06:38,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:06:38,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:06:38,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:06:38,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:06:38,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:06:38,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:06:38,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:06:38,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:06:38,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:06:38,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:38,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:06:38,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:06:38,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:06:38,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:06:38,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:06:38,774 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:06:38,774 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:06:38,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:06:38,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:06:38,775 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_69f06f1f-5a0d-48e7-9b2d-83b534767826/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e8b2633622084f06b754f22cb180cb188cb0d4f [2021-10-15 19:06:39,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:06:39,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:06:39,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:06:39,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:06:39,098 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:06:39,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-10-15 19:06:39,185 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/data/1c330ebfb/21e3cee579cf461ead895589aa0aafaf/FLAGc44da233c [2021-10-15 19:06:39,706 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:06:39,709 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c [2021-10-15 19:06:39,730 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/data/1c330ebfb/21e3cee579cf461ead895589aa0aafaf/FLAGc44da233c [2021-10-15 19:06:40,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/data/1c330ebfb/21e3cee579cf461ead895589aa0aafaf [2021-10-15 19:06:40,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:06:40,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:06:40,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:40,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:06:40,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:06:40,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782565ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40, skipping insertion in model container [2021-10-15 19:06:40,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:06:40,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:06:40,276 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_69f06f1f-5a0d-48e7-9b2d-83b534767826/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c[489,502] [2021-10-15 19:06:40,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:40,302 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:06:40,312 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_69f06f1f-5a0d-48e7-9b2d-83b534767826/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound1.c[489,502] [2021-10-15 19:06:40,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:06:40,333 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:06:40,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40 WrapperNode [2021-10-15 19:06:40,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:06:40,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:40,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:06:40,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:06:40,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:06:40,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:06:40,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:06:40,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:06:40,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:06:40,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:06:40,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:06:40,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:06:40,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (1/1) ... [2021-10-15 19:06:40,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:06:40,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:40,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:06:40,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:06:40,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:06:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:06:40,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:06:40,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:06:40,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:06:40,781 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-10-15 19:06:40,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:40 BoogieIcfgContainer [2021-10-15 19:06:40,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:06:40,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:06:40,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:06:40,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:06:40,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:06:40" (1/3) ... [2021-10-15 19:06:40,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a609f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:40, skipping insertion in model container [2021-10-15 19:06:40,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:06:40" (2/3) ... [2021-10-15 19:06:40,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a609f90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:06:40, skipping insertion in model container [2021-10-15 19:06:40,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:40" (3/3) ... [2021-10-15 19:06:40,793 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound1.c [2021-10-15 19:06:40,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:06:40,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-15 19:06:40,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:06:40,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:06:40,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-15 19:06:40,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 53 transitions, 106 flow [2021-10-15 19:06:40,939 INFO L129 PetriNetUnfolder]: 13/53 cut-off events. [2021-10-15 19:06:40,940 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:40,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 53 events. 13/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:06:40,942 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 53 transitions, 106 flow [2021-10-15 19:06:40,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 48 transitions, 96 flow [2021-10-15 19:06:40,954 INFO L129 PetriNetUnfolder]: 5/20 cut-off events. [2021-10-15 19:06:40,954 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:40,954 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:40,955 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:40,956 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:40,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2044010099, now seen corresponding path program 1 times [2021-10-15 19:06:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:40,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911789324] [2021-10-15 19:06:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:40,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:41,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:41,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:41,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911789324] [2021-10-15 19:06:41,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911789324] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:41,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:41,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:06:41,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559300750] [2021-10-15 19:06:41,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:06:41,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:06:41,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:06:41,235 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 53 [2021-10-15 19:06:41,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 48 transitions, 96 flow. Second operand has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:41,239 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 53 [2021-10-15 19:06:41,241 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:41,269 INFO L129 PetriNetUnfolder]: 3/39 cut-off events. [2021-10-15 19:06:41,270 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:41,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 39 events. 3/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 9/39 useless extension candidates. Maximal degree in co-relation 39. Up to 3 conditions per place. [2021-10-15 19:06:41,274 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 0 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2021-10-15 19:06:41,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 78 flow [2021-10-15 19:06:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:06:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:06:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 95 transitions. [2021-10-15 19:06:41,289 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8962264150943396 [2021-10-15 19:06:41,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 95 transitions. [2021-10-15 19:06:41,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 95 transitions. [2021-10-15 19:06:41,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:41,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 95 transitions. [2021-10-15 19:06:41,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 47.5) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,307 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,309 INFO L186 Difference]: Start difference. First operand has 37 places, 48 transitions, 96 flow. Second operand 2 states and 95 transitions. [2021-10-15 19:06:41,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 78 flow [2021-10-15 19:06:41,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 78 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:41,319 INFO L242 Difference]: Finished difference. Result has 38 places, 39 transitions, 78 flow [2021-10-15 19:06:41,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2021-10-15 19:06:41,323 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2021-10-15 19:06:41,324 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 78 flow [2021-10-15 19:06:41,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 44.0) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,324 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:41,325 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:41,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:06:41,325 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:41,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:41,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2021-10-15 19:06:41,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:41,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262439604] [2021-10-15 19:06:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:41,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:41,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:41,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520919232] [2021-10-15 19:06:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:41,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:41,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:06:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:41,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 19:06:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:41,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:41,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262439604] [2021-10-15 19:06:41,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:41,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520919232] [2021-10-15 19:06:41,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520919232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:41,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:41,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:06:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757371988] [2021-10-15 19:06:41,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:41,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:41,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:41,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2021-10-15 19:06:41,661 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,661 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:41,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2021-10-15 19:06:41,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:41,796 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-10-15 19:06:41,798 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:06:41,799 INFO L84 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 112. Up to 25 conditions per place. [2021-10-15 19:06:41,802 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 38 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2021-10-15 19:06:41,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 206 flow [2021-10-15 19:06:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2021-10-15 19:06:41,809 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2021-10-15 19:06:41,809 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 118 transitions. [2021-10-15 19:06:41,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 118 transitions. [2021-10-15 19:06:41,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:41,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 118 transitions. [2021-10-15 19:06:41,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,819 INFO L186 Difference]: Start difference. First operand has 38 places, 39 transitions, 78 flow. Second operand 4 states and 118 transitions. [2021-10-15 19:06:41,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 206 flow [2021-10-15 19:06:41,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 59 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:06:41,825 INFO L242 Difference]: Finished difference. Result has 43 places, 44 transitions, 124 flow [2021-10-15 19:06:41,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2021-10-15 19:06:41,826 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 6 predicate places. [2021-10-15 19:06:41,826 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 124 flow [2021-10-15 19:06:41,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:41,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:41,827 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:41,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:42,045 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1507402239, now seen corresponding path program 1 times [2021-10-15 19:06:42,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:42,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501620955] [2021-10-15 19:06:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:42,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:42,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:42,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501620955] [2021-10-15 19:06:42,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501620955] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:42,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:42,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:06:42,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465663691] [2021-10-15 19:06:42,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:42,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:42,125 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2021-10-15 19:06:42,126 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,130 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:42,130 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2021-10-15 19:06:42,130 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:42,156 INFO L129 PetriNetUnfolder]: 5/70 cut-off events. [2021-10-15 19:06:42,158 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-10-15 19:06:42,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 70 events. 5/70 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 1/61 useless extension candidates. Maximal degree in co-relation 100. Up to 8 conditions per place. [2021-10-15 19:06:42,161 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 5 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2021-10-15 19:06:42,162 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 148 flow [2021-10-15 19:06:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2021-10-15 19:06:42,167 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7547169811320755 [2021-10-15 19:06:42,167 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2021-10-15 19:06:42,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2021-10-15 19:06:42,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:42,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2021-10-15 19:06:42,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,175 INFO L186 Difference]: Start difference. First operand has 43 places, 44 transitions, 124 flow. Second operand 4 states and 160 transitions. [2021-10-15 19:06:42,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 148 flow [2021-10-15 19:06:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:42,181 INFO L242 Difference]: Finished difference. Result has 47 places, 46 transitions, 146 flow [2021-10-15 19:06:42,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2021-10-15 19:06:42,183 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2021-10-15 19:06:42,185 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 146 flow [2021-10-15 19:06:42,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,186 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:42,186 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:42,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:06:42,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 515817425, now seen corresponding path program 1 times [2021-10-15 19:06:42,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:42,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622104404] [2021-10-15 19:06:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:42,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:42,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:42,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150411376] [2021-10-15 19:06:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:42,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:42,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:42,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:06:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 19:06:42,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:42,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:42,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622104404] [2021-10-15 19:06:42,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:42,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150411376] [2021-10-15 19:06:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150411376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:42,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:42,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 19:06:42,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218791333] [2021-10-15 19:06:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 19:06:42,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 19:06:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 19:06:42,587 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2021-10-15 19:06:42,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:42,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2021-10-15 19:06:42,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:42,784 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-10-15 19:06:42,784 INFO L130 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2021-10-15 19:06:42,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 68 events. 5/68 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 148. Up to 26 conditions per place. [2021-10-15 19:06:42,785 INFO L132 encePairwiseOnDemand]: 44/53 looper letters, 43 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2021-10-15 19:06:42,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 280 flow [2021-10-15 19:06:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:42,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:42,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2021-10-15 19:06:42,788 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.36556603773584906 [2021-10-15 19:06:42,788 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 155 transitions. [2021-10-15 19:06:42,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 155 transitions. [2021-10-15 19:06:42,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:42,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 155 transitions. [2021-10-15 19:06:42,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,792 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,792 INFO L186 Difference]: Start difference. First operand has 47 places, 46 transitions, 146 flow. Second operand 8 states and 155 transitions. [2021-10-15 19:06:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 280 flow [2021-10-15 19:06:42,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:06:42,796 INFO L242 Difference]: Finished difference. Result has 54 places, 47 transitions, 168 flow [2021-10-15 19:06:42,796 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2021-10-15 19:06:42,797 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2021-10-15 19:06:42,797 INFO L470 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 168 flow [2021-10-15 19:06:42,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:42,797 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:42,798 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:42,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:43,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:43,013 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1779462740, now seen corresponding path program 1 times [2021-10-15 19:06:43,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:43,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554044102] [2021-10-15 19:06:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:43,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:43,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:43,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931428675] [2021-10-15 19:06:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:43,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:43,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:43,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:06:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 19:06:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:43,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:43,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:43,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554044102] [2021-10-15 19:06:43,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:43,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931428675] [2021-10-15 19:06:43,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931428675] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:43,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:43,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:06:43,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742521160] [2021-10-15 19:06:43,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:43,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:43,297 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2021-10-15 19:06:43,297 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 19:06:43,297 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:43,298 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2021-10-15 19:06:43,298 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:43,444 INFO L129 PetriNetUnfolder]: 10/125 cut-off events. [2021-10-15 19:06:43,444 INFO L130 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2021-10-15 19:06:43,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 125 events. 10/125 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 407 event pairs, 0 based on Foata normal form. 2/113 useless extension candidates. Maximal degree in co-relation 289. Up to 51 conditions per place. [2021-10-15 19:06:43,446 INFO L132 encePairwiseOnDemand]: 42/53 looper letters, 50 selfloop transitions, 12 changer transitions 4/77 dead transitions. [2021-10-15 19:06:43,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 408 flow [2021-10-15 19:06:43,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 19:06:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-15 19:06:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2021-10-15 19:06:43,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37735849056603776 [2021-10-15 19:06:43,449 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 160 transitions. [2021-10-15 19:06:43,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 160 transitions. [2021-10-15 19:06:43,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:43,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 160 transitions. [2021-10-15 19:06:43,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,453 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 53.0) internal successors, (477), 9 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,453 INFO L186 Difference]: Start difference. First operand has 54 places, 47 transitions, 168 flow. Second operand 8 states and 160 transitions. [2021-10-15 19:06:43,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 408 flow [2021-10-15 19:06:43,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 397 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-10-15 19:06:43,458 INFO L242 Difference]: Finished difference. Result has 59 places, 55 transitions, 247 flow [2021-10-15 19:06:43,459 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=247, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2021-10-15 19:06:43,459 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 22 predicate places. [2021-10-15 19:06:43,459 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 247 flow [2021-10-15 19:06:43,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 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 19:06:43,459 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:43,460 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:43,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:43,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:43,684 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash -801918668, now seen corresponding path program 1 times [2021-10-15 19:06:43,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:43,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023266294] [2021-10-15 19:06:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:43,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:43,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:43,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508807549] [2021-10-15 19:06:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:43,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:43,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:43,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:43,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:06:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:06:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:43,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:43,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023266294] [2021-10-15 19:06:43,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:43,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508807549] [2021-10-15 19:06:43,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508807549] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:43,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:43,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:06:43,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315267105] [2021-10-15 19:06:43,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:06:43,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:43,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:06:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:06:43,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2021-10-15 19:06:43,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:43,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2021-10-15 19:06:43,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:43,920 INFO L129 PetriNetUnfolder]: 7/155 cut-off events. [2021-10-15 19:06:43,920 INFO L130 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2021-10-15 19:06:43,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 155 events. 7/155 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 565 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 388. Up to 79 conditions per place. [2021-10-15 19:06:43,922 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 50 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2021-10-15 19:06:43,922 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 407 flow [2021-10-15 19:06:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:06:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:06:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2021-10-15 19:06:43,923 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2021-10-15 19:06:43,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 101 transitions. [2021-10-15 19:06:43,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 101 transitions. [2021-10-15 19:06:43,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:43,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 101 transitions. [2021-10-15 19:06:43,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,925 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 53.0) internal successors, (265), 5 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,925 INFO L186 Difference]: Start difference. First operand has 59 places, 55 transitions, 247 flow. Second operand 4 states and 101 transitions. [2021-10-15 19:06:43,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 407 flow [2021-10-15 19:06:43,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 398 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-10-15 19:06:43,931 INFO L242 Difference]: Finished difference. Result has 61 places, 58 transitions, 275 flow [2021-10-15 19:06:43,932 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2021-10-15 19:06:43,932 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 24 predicate places. [2021-10-15 19:06:43,932 INFO L470 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 275 flow [2021-10-15 19:06:43,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:43,933 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:43,933 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:43,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:44,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:44,153 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:44,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1795587856, now seen corresponding path program 1 times [2021-10-15 19:06:44,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:44,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53594704] [2021-10-15 19:06:44,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:44,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:44,166 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:44,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687996732] [2021-10-15 19:06:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:44,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:44,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:44,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:06:44,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:44,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-15 19:06:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:44,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:44,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53594704] [2021-10-15 19:06:44,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:44,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687996732] [2021-10-15 19:06:44,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687996732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:06:44,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:06:44,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-10-15 19:06:44,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520051707] [2021-10-15 19:06:44,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:06:44,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:06:44,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:06:44,339 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2021-10-15 19:06:44,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:44,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2021-10-15 19:06:44,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:44,376 INFO L129 PetriNetUnfolder]: 0/54 cut-off events. [2021-10-15 19:06:44,376 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 19:06:44,377 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 54 events. 0/54 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 2/53 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-10-15 19:06:44,377 INFO L132 encePairwiseOnDemand]: 49/53 looper letters, 2 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2021-10-15 19:06:44,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 38 transitions, 174 flow [2021-10-15 19:06:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:06:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:06:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2021-10-15 19:06:44,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7433962264150943 [2021-10-15 19:06:44,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 197 transitions. [2021-10-15 19:06:44,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 197 transitions. [2021-10-15 19:06:44,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:44,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 197 transitions. [2021-10-15 19:06:44,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.4) internal successors, (197), 5 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,382 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,383 INFO L186 Difference]: Start difference. First operand has 61 places, 58 transitions, 275 flow. Second operand 5 states and 197 transitions. [2021-10-15 19:06:44,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 38 transitions, 174 flow [2021-10-15 19:06:44,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 8 redundant places. [2021-10-15 19:06:44,386 INFO L242 Difference]: Finished difference. Result has 51 places, 38 transitions, 148 flow [2021-10-15 19:06:44,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2021-10-15 19:06:44,386 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 14 predicate places. [2021-10-15 19:06:44,387 INFO L470 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 148 flow [2021-10-15 19:06:44,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,387 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:44,387 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:44,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:44,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:44,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1844536457, now seen corresponding path program 1 times [2021-10-15 19:06:44,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:44,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122958969] [2021-10-15 19:06:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:44,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:44,632 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:44,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837662252] [2021-10-15 19:06:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:44,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:44,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:06:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:06:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 19:06:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:06:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:06:44,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:06:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122958969] [2021-10-15 19:06:44,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:06:44,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837662252] [2021-10-15 19:06:44,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837662252] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:06:44,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:06:44,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 19:06:44,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100426720] [2021-10-15 19:06:44,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:06:44,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:06:44,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:06:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:06:44,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2021-10-15 19:06:44,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:44,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:06:44,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2021-10-15 19:06:44,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:06:45,021 INFO L129 PetriNetUnfolder]: 0/52 cut-off events. [2021-10-15 19:06:45,022 INFO L130 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2021-10-15 19:06:45,022 INFO L84 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 52 events. 0/52 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 95 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2021-10-15 19:06:45,022 INFO L132 encePairwiseOnDemand]: 45/53 looper letters, 26 selfloop transitions, 4 changer transitions 8/48 dead transitions. [2021-10-15 19:06:45,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 252 flow [2021-10-15 19:06:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:06:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:06:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2021-10-15 19:06:45,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4056603773584906 [2021-10-15 19:06:45,025 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 129 transitions. [2021-10-15 19:06:45,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 129 transitions. [2021-10-15 19:06:45,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:06:45,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 129 transitions. [2021-10-15 19:06:45,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:45,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:45,027 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 53.0) internal successors, (371), 7 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:45,027 INFO L186 Difference]: Start difference. First operand has 51 places, 38 transitions, 148 flow. Second operand 6 states and 129 transitions. [2021-10-15 19:06:45,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 252 flow [2021-10-15 19:06:45,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 237 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-10-15 19:06:45,033 INFO L242 Difference]: Finished difference. Result has 52 places, 35 transitions, 127 flow [2021-10-15 19:06:45,033 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2021-10-15 19:06:45,034 INFO L334 CegarLoopForPetriNet]: 37 programPoint places, 15 predicate places. [2021-10-15 19:06:45,034 INFO L470 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 127 flow [2021-10-15 19:06:45,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:06:45,034 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:06:45,034 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:06:45,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:45,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:45,253 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-15 19:06:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:06:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash 228593789, now seen corresponding path program 1 times [2021-10-15 19:06:45,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:06:45,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781703232] [2021-10-15 19:06:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:45,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:06:45,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:06:45,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951169232] [2021-10-15 19:06:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:06:45,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:06:45,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:06:45,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:06:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:06:45,375 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:06:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:06:45,411 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:06:45,411 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:06:45,412 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,414 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,415 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:06:45,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:06:45,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:06:45,631 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:06:45,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:06:45 BoogieIcfgContainer [2021-10-15 19:06:45,663 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:06:45,663 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:06:45,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:06:45,664 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:06:45,664 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:06:40" (3/4) ... [2021-10-15 19:06:45,666 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:06:45,714 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:06:45,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:06:45,716 INFO L168 Benchmark]: Toolchain (without parser) took 5655.18 ms. Allocated memory was 146.8 MB in the beginning and 180.4 MB in the end (delta: 33.6 MB). Free memory was 110.4 MB in the beginning and 103.1 MB in the end (delta: 7.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,717 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 117.3 MB in the beginning and 117.3 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:06:45,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.06 ms. Allocated memory is still 146.8 MB. Free memory was 110.1 MB in the beginning and 121.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,718 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.04 ms. Allocated memory is still 146.8 MB. Free memory was 121.1 MB in the beginning and 119.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,718 INFO L168 Benchmark]: Boogie Preprocessor took 24.84 ms. Allocated memory is still 146.8 MB. Free memory was 119.4 MB in the beginning and 118.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,719 INFO L168 Benchmark]: RCFGBuilder took 387.99 ms. Allocated memory is still 146.8 MB. Free memory was 118.2 MB in the beginning and 106.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,720 INFO L168 Benchmark]: TraceAbstraction took 4877.70 ms. Allocated memory was 146.8 MB in the beginning and 180.4 MB in the end (delta: 33.6 MB). Free memory was 105.6 MB in the beginning and 105.3 MB in the end (delta: 297.6 kB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,720 INFO L168 Benchmark]: Witness Printer took 51.43 ms. Allocated memory is still 180.4 MB. Free memory was 105.3 MB in the beginning and 103.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:06:45,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 117.3 MB in the beginning and 117.3 MB in the end (delta: 26.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.06 ms. Allocated memory is still 146.8 MB. Free memory was 110.1 MB in the beginning and 121.1 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.04 ms. Allocated memory is still 146.8 MB. Free memory was 121.1 MB in the beginning and 119.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.84 ms. Allocated memory is still 146.8 MB. Free memory was 119.4 MB in the beginning and 118.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 387.99 ms. Allocated memory is still 146.8 MB. Free memory was 118.2 MB in the beginning and 106.4 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4877.70 ms. Allocated memory was 146.8 MB in the beginning and 180.4 MB in the end (delta: 33.6 MB). Free memory was 105.6 MB in the beginning and 105.3 MB in the end (delta: 297.6 kB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * Witness Printer took 51.43 ms. Allocated memory is still 180.4 MB. Free memory was 105.3 MB in the beginning and 103.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<1 [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L11] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(a != b)) VAL [counter=1] [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND FALSE !(counter++<1) [L11] COND TRUE !(cond) VAL [counter=2] [L13] reach_error() VAL [counter=2] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4770.5ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 1006.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 62.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 85 SDtfs, 261 SDslu, 108 SDs, 0 SdLazy, 302 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 298.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 350.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=275occurred in iteration=6, InterpolantAutomatonStates: 41, 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: 55.5ms SsaConstructionTime, 213.3ms SatisfiabilityAnalysisTime, 1057.6ms InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 447 SizeOfPredicates, 36 NumberOfNonLiveVariables, 532 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:06:45,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69f06f1f-5a0d-48e7-9b2d-83b534767826/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...