./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/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_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/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_ea5a0e86-f867-49d6-9c65-c21f18ba2962/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 0036602275d14d2f63e3aedc245d67d50c1210f9 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:32:02,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:32:02,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:32:02,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:32:02,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:32:02,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:32:02,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:32:02,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:32:02,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:32:02,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:32:02,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:32:02,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:32:02,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:32:02,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:32:02,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:32:02,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:32:02,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:32:02,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:32:02,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:32:02,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:32:02,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:32:02,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:32:02,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:32:02,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:32:02,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:32:02,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:32:02,609 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:32:02,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:32:02,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:32:02,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:32:02,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:32:02,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:32:02,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:32:02,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:32:02,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:32:02,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:32:02,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:32:02,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:32:02,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:32:02,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:32:02,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:32:02,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:32:02,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:32:02,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:32:02,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:32:02,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:32:02,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:32:02,683 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:32:02,683 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:32:02,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:32:02,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:32:02,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:32:02,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:32:02,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:32:02,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:32:02,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:32:02,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:32:02,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:32:02,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:32:02,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:32:02,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:32:02,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:32:02,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:32:02,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:32:02,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:02,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:32:02,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:32:02,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:32:02,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:32:02,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:32:02,690 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:32:02,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:32:02,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:32:02,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:32:02,693 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_ea5a0e86-f867-49d6-9c65-c21f18ba2962/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0036602275d14d2f63e3aedc245d67d50c1210f9 [2021-10-15 19:32:03,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:32:03,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:32:03,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:32:03,070 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:32:03,071 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:32:03,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2021-10-15 19:32:03,156 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/data/535b9f9bb/efd3356221dd46669c4cc7e55b8b73f6/FLAGaafa0f76d [2021-10-15 19:32:03,844 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:32:03,848 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2021-10-15 19:32:03,865 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/data/535b9f9bb/efd3356221dd46669c4cc7e55b8b73f6/FLAGaafa0f76d [2021-10-15 19:32:04,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/data/535b9f9bb/efd3356221dd46669c4cc7e55b8b73f6 [2021-10-15 19:32:04,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:32:04,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:32:04,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:04,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:32:04,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:32:04,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af325a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04, skipping insertion in model container [2021-10-15 19:32:04,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:32:04,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:32:04,468 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_ea5a0e86-f867-49d6-9c65-c21f18ba2962/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2021-10-15 19:32:04,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:04,511 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:32:04,533 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_ea5a0e86-f867-49d6-9c65-c21f18ba2962/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2021-10-15 19:32:04,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:32:04,580 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:32:04,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04 WrapperNode [2021-10-15 19:32:04,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:32:04,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:04,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:32:04,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:32:04,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:32:04,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:32:04,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:32:04,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:32:04,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:32:04,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:32:04,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:32:04,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:32:04,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (1/1) ... [2021-10-15 19:32:04,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:32:04,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:04,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:32:04,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:32:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:32:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:32:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:32:04,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:32:05,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:32:05,096 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-15 19:32:05,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:05 BoogieIcfgContainer [2021-10-15 19:32:05,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:32:05,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:32:05,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:32:05,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:32:05,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:32:04" (1/3) ... [2021-10-15 19:32:05,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414f4bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:05, skipping insertion in model container [2021-10-15 19:32:05,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:32:04" (2/3) ... [2021-10-15 19:32:05,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414f4bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:32:05, skipping insertion in model container [2021-10-15 19:32:05,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:05" (3/3) ... [2021-10-15 19:32:05,106 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2021-10-15 19:32:05,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:32:05,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-15 19:32:05,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:32:05,168 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 19:32:05,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-15 19:32:05,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 40 transitions, 80 flow [2021-10-15 19:32:05,203 INFO L129 PetriNetUnfolder]: 9/40 cut-off events. [2021-10-15 19:32:05,203 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:05,205 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 40 events. 9/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-10-15 19:32:05,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 40 transitions, 80 flow [2021-10-15 19:32:05,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 35 transitions, 70 flow [2021-10-15 19:32:05,214 INFO L129 PetriNetUnfolder]: 3/13 cut-off events. [2021-10-15 19:32:05,214 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:05,215 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:05,215 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:32:05,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:05,222 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-15 19:32:05,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:05,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050730092] [2021-10-15 19:32:05,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:05,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:05,408 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 19:32:05,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:05,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050730092] [2021-10-15 19:32:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050730092] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:05,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:05,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:32:05,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152740065] [2021-10-15 19:32:05,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-15 19:32:05,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:05,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-15 19:32:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-15 19:32:05,445 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 40 [2021-10-15 19:32:05,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 35 transitions, 70 flow. Second operand has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,449 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:05,449 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 40 [2021-10-15 19:32:05,451 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:05,462 INFO L129 PetriNetUnfolder]: 2/29 cut-off events. [2021-10-15 19:32:05,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:05,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 29 events. 2/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 6/28 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2021-10-15 19:32:05,466 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2021-10-15 19:32:05,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:05,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-15 19:32:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-10-15 19:32:05,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 72 transitions. [2021-10-15 19:32:05,479 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9 [2021-10-15 19:32:05,480 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 72 transitions. [2021-10-15 19:32:05,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 72 transitions. [2021-10-15 19:32:05,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:05,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 72 transitions. [2021-10-15 19:32:05,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,492 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,495 INFO L186 Difference]: Start difference. First operand has 28 places, 35 transitions, 70 flow. Second operand 2 states and 72 transitions. [2021-10-15 19:32:05,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:05,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 29 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:05,501 INFO L242 Difference]: Finished difference. Result has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:05,503 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2021-10-15 19:32:05,504 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2021-10-15 19:32:05,504 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 58 flow [2021-10-15 19:32:05,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 33.5) internal successors, (67), 2 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,505 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:05,505 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-15 19:32:05,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:32:05,506 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-15 19:32:05,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:05,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820077012] [2021-10-15 19:32:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:05,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:05,604 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 19:32:05,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:05,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820077012] [2021-10-15 19:32:05,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820077012] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:05,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:05,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:05,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468593869] [2021-10-15 19:32:05,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:05,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:05,624 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2021-10-15 19:32:05,625 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,625 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:05,625 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2021-10-15 19:32:05,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:05,781 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2021-10-15 19:32:05,782 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:32:05,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 29 events. 3/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 48. Up to 10 conditions per place. [2021-10-15 19:32:05,793 INFO L132 encePairwiseOnDemand]: 28/40 looper letters, 9 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2021-10-15 19:32:05,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 92 flow [2021-10-15 19:32:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2021-10-15 19:32:05,798 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45625 [2021-10-15 19:32:05,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 73 transitions. [2021-10-15 19:32:05,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 73 transitions. [2021-10-15 19:32:05,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:05,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 73 transitions. [2021-10-15 19:32:05,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,809 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,809 INFO L186 Difference]: Start difference. First operand has 29 places, 29 transitions, 58 flow. Second operand 4 states and 73 transitions. [2021-10-15 19:32:05,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 92 flow [2021-10-15 19:32:05,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 92 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:32:05,814 INFO L242 Difference]: Finished difference. Result has 29 places, 27 transitions, 88 flow [2021-10-15 19:32:05,819 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2021-10-15 19:32:05,820 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2021-10-15 19:32:05,821 INFO L470 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 88 flow [2021-10-15 19:32:05,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:05,821 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:05,822 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:32:05,823 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:05,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-15 19:32:05,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:05,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379359639] [2021-10-15 19:32:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:05,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:05,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:05,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528061842] [2021-10-15 19:32:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:05,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:05,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:05,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:05,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:32:05,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:06,026 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 19:32:06,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:06,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379359639] [2021-10-15 19:32:06,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:06,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528061842] [2021-10-15 19:32:06,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528061842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:06,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:06,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780147803] [2021-10-15 19:32:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:06,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:06,032 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:06,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:06,033 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:06,033 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:06,106 INFO L129 PetriNetUnfolder]: 3/45 cut-off events. [2021-10-15 19:32:06,106 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:32:06,107 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 45 events. 3/45 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 2/45 useless extension candidates. Maximal degree in co-relation 107. Up to 19 conditions per place. [2021-10-15 19:32:06,107 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 28 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2021-10-15 19:32:06,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 207 flow [2021-10-15 19:32:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:32:06,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:32:06,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2021-10-15 19:32:06,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.51875 [2021-10-15 19:32:06,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2021-10-15 19:32:06,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2021-10-15 19:32:06,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:06,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2021-10-15 19:32:06,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,114 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 40.0) internal successors, (200), 5 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,115 INFO L186 Difference]: Start difference. First operand has 29 places, 27 transitions, 88 flow. Second operand 4 states and 83 transitions. [2021-10-15 19:32:06,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 207 flow [2021-10-15 19:32:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:32:06,119 INFO L242 Difference]: Finished difference. Result has 32 places, 32 transitions, 132 flow [2021-10-15 19:32:06,120 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=32, PETRI_TRANSITIONS=32} [2021-10-15 19:32:06,120 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2021-10-15 19:32:06,120 INFO L470 AbstractCegarLoop]: Abstraction has has 32 places, 32 transitions, 132 flow [2021-10-15 19:32:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,121 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:06,121 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:06,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:06,343 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-15 19:32:06,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:06,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983206176] [2021-10-15 19:32:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:06,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:06,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:06,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868295680] [2021-10-15 19:32:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:06,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:06,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:06,377 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:06,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:32:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:06,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:06,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:06,645 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 19:32:06,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983206176] [2021-10-15 19:32:06,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:06,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868295680] [2021-10-15 19:32:06,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868295680] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:32:06,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:32:06,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 19:32:06,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587441978] [2021-10-15 19:32:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:32:06,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:32:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:32:06,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:06,651 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 32 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,651 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:06,651 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:06,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:06,732 INFO L129 PetriNetUnfolder]: 4/45 cut-off events. [2021-10-15 19:32:06,732 INFO L130 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2021-10-15 19:32:06,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 45 events. 4/45 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 2/47 useless extension candidates. Maximal degree in co-relation 119. Up to 20 conditions per place. [2021-10-15 19:32:06,733 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 22 selfloop transitions, 5 changer transitions 7/41 dead transitions. [2021-10-15 19:32:06,733 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 230 flow [2021-10-15 19:32:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 19:32:06,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-15 19:32:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2021-10-15 19:32:06,736 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48 [2021-10-15 19:32:06,736 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2021-10-15 19:32:06,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2021-10-15 19:32:06,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:06,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2021-10-15 19:32:06,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,747 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,747 INFO L186 Difference]: Start difference. First operand has 32 places, 32 transitions, 132 flow. Second operand 5 states and 96 transitions. [2021-10-15 19:32:06,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 230 flow [2021-10-15 19:32:06,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:32:06,752 INFO L242 Difference]: Finished difference. Result has 37 places, 31 transitions, 143 flow [2021-10-15 19:32:06,754 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=143, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2021-10-15 19:32:06,754 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2021-10-15 19:32:06,755 INFO L470 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 143 flow [2021-10-15 19:32:06,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:06,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:06,761 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:06,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:06,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:06,975 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash -677045505, now seen corresponding path program 1 times [2021-10-15 19:32:06,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:06,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682484289] [2021-10-15 19:32:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:06,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:06,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:06,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205451179] [2021-10-15 19:32:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:06,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:06,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:07,004 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:07,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:32:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 19:32:07,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:07,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:07,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682484289] [2021-10-15 19:32:07,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:07,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205451179] [2021-10-15 19:32:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205451179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:07,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:07,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:32:07,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823298923] [2021-10-15 19:32:07,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:07,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:07,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:07,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:07,352 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:07,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:07,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:07,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:07,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:07,512 INFO L129 PetriNetUnfolder]: 3/55 cut-off events. [2021-10-15 19:32:07,513 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-10-15 19:32:07,514 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 55 events. 3/55 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 157. Up to 19 conditions per place. [2021-10-15 19:32:07,515 INFO L132 encePairwiseOnDemand]: 30/40 looper letters, 31 selfloop transitions, 10 changer transitions 1/49 dead transitions. [2021-10-15 19:32:07,516 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 301 flow [2021-10-15 19:32:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2021-10-15 19:32:07,521 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2021-10-15 19:32:07,521 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 116 transitions. [2021-10-15 19:32:07,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 116 transitions. [2021-10-15 19:32:07,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:07,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 116 transitions. [2021-10-15 19:32:07,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:07,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:07,525 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:07,525 INFO L186 Difference]: Start difference. First operand has 37 places, 31 transitions, 143 flow. Second operand 6 states and 116 transitions. [2021-10-15 19:32:07,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 301 flow [2021-10-15 19:32:07,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 278 flow, removed 9 selfloop flow, removed 2 redundant places. [2021-10-15 19:32:07,533 INFO L242 Difference]: Finished difference. Result has 42 places, 36 transitions, 198 flow [2021-10-15 19:32:07,534 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2021-10-15 19:32:07,534 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 14 predicate places. [2021-10-15 19:32:07,534 INFO L470 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 198 flow [2021-10-15 19:32:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:07,536 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:07,536 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:07,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:07,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:07,763 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2100512702, now seen corresponding path program 1 times [2021-10-15 19:32:07,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:07,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812802342] [2021-10-15 19:32:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:07,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:07,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:07,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532749023] [2021-10-15 19:32:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:07,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:07,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:07,796 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:07,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 19:32:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 19:32:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:08,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:08,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812802342] [2021-10-15 19:32:08,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:08,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532749023] [2021-10-15 19:32:08,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532749023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:08,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:08,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:32:08,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856804498] [2021-10-15 19:32:08,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 19:32:08,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:08,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 19:32:08,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:32:08,050 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:08,051 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,051 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:08,051 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:08,051 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:08,178 INFO L129 PetriNetUnfolder]: 4/55 cut-off events. [2021-10-15 19:32:08,178 INFO L130 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2021-10-15 19:32:08,179 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 55 events. 4/55 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 0 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 173. Up to 20 conditions per place. [2021-10-15 19:32:08,180 INFO L132 encePairwiseOnDemand]: 32/40 looper letters, 26 selfloop transitions, 8 changer transitions 8/49 dead transitions. [2021-10-15 19:32:08,180 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 334 flow [2021-10-15 19:32:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:32:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:32:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2021-10-15 19:32:08,182 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2021-10-15 19:32:08,182 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 127 transitions. [2021-10-15 19:32:08,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 127 transitions. [2021-10-15 19:32:08,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:08,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 127 transitions. [2021-10-15 19:32:08,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,185 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,186 INFO L186 Difference]: Start difference. First operand has 42 places, 36 transitions, 198 flow. Second operand 7 states and 127 transitions. [2021-10-15 19:32:08,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 334 flow [2021-10-15 19:32:08,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 304 flow, removed 3 selfloop flow, removed 3 redundant places. [2021-10-15 19:32:08,191 INFO L242 Difference]: Finished difference. Result has 47 places, 35 transitions, 198 flow [2021-10-15 19:32:08,192 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2021-10-15 19:32:08,192 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2021-10-15 19:32:08,192 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 198 flow [2021-10-15 19:32:08,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,193 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:08,193 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-15 19:32:08,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:08,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:08,410 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:08,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:08,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2093393681, now seen corresponding path program 2 times [2021-10-15 19:32:08,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:08,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439364965] [2021-10-15 19:32:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:08,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:08,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:08,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323914471] [2021-10-15 19:32:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 19:32:08,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:08,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:08,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 19:32:08,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 19:32:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 19:32:08,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 19:32:08,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:08,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:08,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439364965] [2021-10-15 19:32:08,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:08,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323914471] [2021-10-15 19:32:08,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323914471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:08,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:08,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-10-15 19:32:08,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446814142] [2021-10-15 19:32:08,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:32:08,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:32:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:32:08,664 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 40 [2021-10-15 19:32:08,665 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,665 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:08,665 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 40 [2021-10-15 19:32:08,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:08,706 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2021-10-15 19:32:08,706 INFO L130 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2021-10-15 19:32:08,707 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 33 events. 0/33 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-10-15 19:32:08,707 INFO L132 encePairwiseOnDemand]: 36/40 looper letters, 3 selfloop transitions, 5 changer transitions 3/29 dead transitions. [2021-10-15 19:32:08,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 29 transitions, 161 flow [2021-10-15 19:32:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 19:32:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-15 19:32:08,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2021-10-15 19:32:08,710 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7458333333333333 [2021-10-15 19:32:08,711 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 179 transitions. [2021-10-15 19:32:08,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 179 transitions. [2021-10-15 19:32:08,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:08,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 179 transitions. [2021-10-15 19:32:08,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.833333333333332) internal successors, (179), 6 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,717 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 40.0) internal successors, (280), 7 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,717 INFO L186 Difference]: Start difference. First operand has 47 places, 35 transitions, 198 flow. Second operand 6 states and 179 transitions. [2021-10-15 19:32:08,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 29 transitions, 161 flow [2021-10-15 19:32:08,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 106 flow, removed 7 selfloop flow, removed 12 redundant places. [2021-10-15 19:32:08,725 INFO L242 Difference]: Finished difference. Result has 36 places, 26 transitions, 90 flow [2021-10-15 19:32:08,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2021-10-15 19:32:08,726 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2021-10-15 19:32:08,726 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 90 flow [2021-10-15 19:32:08,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:08,726 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:08,727 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:08,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:08,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:08,951 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:08,951 INFO L82 PathProgramCache]: Analyzing trace with hash 445082416, now seen corresponding path program 1 times [2021-10-15 19:32:08,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:08,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884635425] [2021-10-15 19:32:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:08,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:08,965 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:08,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528709203] [2021-10-15 19:32:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:08,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:08,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:08,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:08,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 19:32:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:32:09,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:09,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:09,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884635425] [2021-10-15 19:32:09,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:09,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528709203] [2021-10-15 19:32:09,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528709203] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:09,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:09,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:32:09,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772872734] [2021-10-15 19:32:09,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:32:09,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:32:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:32:09,416 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:09,416 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 90 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:09,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:09,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:09,417 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:09,521 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-10-15 19:32:09,521 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2021-10-15 19:32:09,522 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 27 events. 0/27 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 19:32:09,522 INFO L132 encePairwiseOnDemand]: 33/40 looper letters, 14 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2021-10-15 19:32:09,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 27 transitions, 134 flow [2021-10-15 19:32:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:32:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:32:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2021-10-15 19:32:09,524 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2021-10-15 19:32:09,524 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 106 transitions. [2021-10-15 19:32:09,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 106 transitions. [2021-10-15 19:32:09,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:09,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 106 transitions. [2021-10-15 19:32:09,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:09,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:09,526 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:09,527 INFO L186 Difference]: Start difference. First operand has 36 places, 26 transitions, 90 flow. Second operand 7 states and 106 transitions. [2021-10-15 19:32:09,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 27 transitions, 134 flow [2021-10-15 19:32:09,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:32:09,529 INFO L242 Difference]: Finished difference. Result has 38 places, 24 transitions, 97 flow [2021-10-15 19:32:09,529 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2021-10-15 19:32:09,529 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2021-10-15 19:32:09,529 INFO L470 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 97 flow [2021-10-15 19:32:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:09,530 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:32:09,530 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:32:09,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:09,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-15 19:32:09,755 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-15 19:32:09,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:32:09,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1772370605, now seen corresponding path program 1 times [2021-10-15 19:32:09,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:32:09,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589403781] [2021-10-15 19:32:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:09,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:32:09,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-15 19:32:09,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762576672] [2021-10-15 19:32:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:32:09,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:09,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:32:09,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:32:09,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 19:32:09,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:32:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-15 19:32:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:32:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:32:10,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:32:10,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589403781] [2021-10-15 19:32:10,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-15 19:32:10,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762576672] [2021-10-15 19:32:10,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762576672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:32:10,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:32:10,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-10-15 19:32:10,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110517092] [2021-10-15 19:32:10,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 19:32:10,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:32:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 19:32:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:32:10,290 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2021-10-15 19:32:10,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 97 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:10,291 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:32:10,291 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2021-10-15 19:32:10,291 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:32:10,389 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-10-15 19:32:10,389 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-10-15 19:32:10,390 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 25 events. 0/25 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-10-15 19:32:10,390 INFO L132 encePairwiseOnDemand]: 34/40 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2021-10-15 19:32:10,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 25 transitions, 139 flow [2021-10-15 19:32:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 19:32:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-15 19:32:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2021-10-15 19:32:10,392 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.375 [2021-10-15 19:32:10,392 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 105 transitions. [2021-10-15 19:32:10,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 105 transitions. [2021-10-15 19:32:10,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:32:10,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 105 transitions. [2021-10-15 19:32:10,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:10,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:10,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:10,397 INFO L186 Difference]: Start difference. First operand has 38 places, 24 transitions, 97 flow. Second operand 7 states and 105 transitions. [2021-10-15 19:32:10,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 25 transitions, 139 flow [2021-10-15 19:32:10,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 25 transitions, 125 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-10-15 19:32:10,401 INFO L242 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2021-10-15 19:32:10,402 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2021-10-15 19:32:10,402 INFO L334 CegarLoopForPetriNet]: 28 programPoint places, 8 predicate places. [2021-10-15 19:32:10,402 INFO L470 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2021-10-15 19:32:10,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:32:10,409 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,409 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,413 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:32:10,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 19:32:10,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:32:10,639 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:32:10,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:32:10 BoogieIcfgContainer [2021-10-15 19:32:10,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:32:10,644 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:32:10,644 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:32:10,644 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:32:10,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:32:05" (3/4) ... [2021-10-15 19:32:10,647 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:32:10,658 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-15 19:32:10,658 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:32:10,658 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:32:10,659 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:32:10,714 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:32:10,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:32:10,716 INFO L168 Benchmark]: Toolchain (without parser) took 6495.19 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 52.7 MB in the beginning and 72.8 MB in the end (delta: -20.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:10,716 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:10,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.80 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 68.3 MB in the end (delta: -15.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:10,717 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.93 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 66.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:10,718 INFO L168 Benchmark]: Boogie Preprocessor took 54.89 ms. Allocated memory is still 94.4 MB. Free memory was 66.7 MB in the beginning and 65.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:32:10,718 INFO L168 Benchmark]: RCFGBuilder took 402.49 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 55.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:10,718 INFO L168 Benchmark]: TraceAbstraction took 5543.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 75.7 MB in the end (delta: -21.0 MB). Peak memory consumption was 675.2 kB. Max. memory is 16.1 GB. [2021-10-15 19:32:10,719 INFO L168 Benchmark]: Witness Printer took 71.00 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 72.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:32:10,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 94.4 MB. Free memory is still 69.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.80 ms. Allocated memory is still 94.4 MB. Free memory was 52.5 MB in the beginning and 68.3 MB in the end (delta: -15.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.93 ms. Allocated memory is still 94.4 MB. Free memory was 68.3 MB in the beginning and 66.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.89 ms. Allocated memory is still 94.4 MB. Free memory was 66.7 MB in the beginning and 65.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 402.49 ms. Allocated memory is still 94.4 MB. Free memory was 65.6 MB in the beginning and 55.1 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5543.68 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 54.7 MB in the beginning and 75.7 MB in the end (delta: -21.0 MB). Peak memory consumption was 675.2 kB. Max. memory is 16.1 GB. * Witness Printer took 71.00 ms. Allocated memory is still 113.2 MB. Free memory was 75.7 MB in the beginning and 72.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5481.8ms, OverallIterations: 9, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 1085.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 42.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 57 SDtfs, 84 SDslu, 70 SDs, 0 SdLazy, 333 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 391.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 287.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=198occurred in iteration=5, InterpolantAutomatonStates: 48, 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: 67.0ms SsaConstructionTime, 212.2ms SatisfiabilityAnalysisTime, 1609.8ms InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 868 SizeOfPredicates, 23 NumberOfNonLiveVariables, 651 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 16/54 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-15 19:32:10,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5a0e86-f867-49d6-9c65-c21f18ba2962/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...