./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN --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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:47:51,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:47:51,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:47:51,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:47:51,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:47:51,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:47:51,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:47:51,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:47:51,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:47:51,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:47:51,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:47:51,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:47:51,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:47:51,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:47:51,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:47:51,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:47:51,609 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:47:51,610 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:47:51,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:47:51,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:47:51,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:47:51,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:47:51,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:47:51,624 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:47:51,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:47:51,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:47:51,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:47:51,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:47:51,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:47:51,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:47:51,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:47:51,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:47:51,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:47:51,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:47:51,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:47:51,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:47:51,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:47:51,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:47:51,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:47:51,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:47:51,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:47:51,649 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:47:51,688 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:47:51,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:47:51,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:47:51,690 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:47:51,691 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:47:51,691 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:47:51,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:47:51,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:47:51,692 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:47:51,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:47:51,694 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:47:51,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:47:51,695 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:47:51,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:47:51,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:47:51,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:47:51,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:47:51,696 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:47:51,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:47:51,697 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:47:51,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:47:51,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:47:51,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:47:51,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:47:51,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:47:51,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:47:51,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:47:51,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:47:51,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:47:51,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:47:51,700 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:47:51,700 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:47:51,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:47:51,701 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_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2022-11-20 10:47:52,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:47:52,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:47:52,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:47:52,073 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:47:52,074 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:47:52,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-11-20 10:47:55,053 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:47:55,229 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:47:55,230 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-11-20 10:47:55,236 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/data/300e680d0/9dfdebf21d27460481524191a51efde9/FLAGad8424e07 [2022-11-20 10:47:55,251 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/data/300e680d0/9dfdebf21d27460481524191a51efde9 [2022-11-20 10:47:55,253 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:47:55,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:47:55,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:47:55,257 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:47:55,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:47:55,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a5df34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55, skipping insertion in model container [2022-11-20 10:47:55,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:47:55,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:47:55,467 WARN L237 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_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-11-20 10:47:55,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:47:55,513 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:47:55,529 WARN L237 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_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i[950,963] [2022-11-20 10:47:55,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:47:55,571 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:47:55,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55 WrapperNode [2022-11-20 10:47:55,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:47:55,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:47:55,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:47:55,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:47:55,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,610 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-11-20 10:47:55,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:47:55,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:47:55,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:47:55,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:47:55,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,655 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:47:55,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:47:55,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:47:55,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:47:55,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (1/1) ... [2022-11-20 10:47:55,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:47:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:55,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:47:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:47:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:47:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 10:47:55,757 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 10:47:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:47:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:47:55,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:47:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 10:47:55,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 10:47:55,834 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:47:55,836 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:47:56,041 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:47:56,051 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:47:56,061 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:47:56,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:56 BoogieIcfgContainer [2022-11-20 10:47:56,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:47:56,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:47:56,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:47:56,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:47:56,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:47:55" (1/3) ... [2022-11-20 10:47:56,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67095bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:56, skipping insertion in model container [2022-11-20 10:47:56,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:47:55" (2/3) ... [2022-11-20 10:47:56,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67095bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:47:56, skipping insertion in model container [2022-11-20 10:47:56,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:56" (3/3) ... [2022-11-20 10:47:56,079 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2022-11-20 10:47:56,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:47:56,100 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:47:56,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:47:56,179 INFO L357 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, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@575cb550, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:47:56,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:47:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:47:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:47:56,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:56,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:56,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:56,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-11-20 10:47:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:56,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748676911] [2022-11-20 10:47:56,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748676911] [2022-11-20 10:47:56,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 10:47:56,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323136480] [2022-11-20 10:47:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:56,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:56,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:47:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 10:47:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:47:56,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:47:56,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323136480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:56,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:56,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:47:56,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593699990] [2022-11-20 10:47:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:56,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:47:56,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:47:56,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:47:56,595 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:47:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:56,658 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-11-20 10:47:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:47:56,660 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-20 10:47:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:56,670 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:47:56,671 INFO L226 Difference]: Without dead ends: 24 [2022-11-20 10:47:56,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:47:56,684 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:56,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:47:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-20 10:47:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-20 10:47:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:47:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-11-20 10:47:56,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-11-20 10:47:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:56,734 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-11-20 10:47:56,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:47:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-11-20 10:47:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:47:56,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:56,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:56,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:56,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 10:47:56,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-11-20 10:47:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57638432] [2022-11-20 10:47:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:56,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:56,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:47:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714705576] [2022-11-20 10:47:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:56,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:56,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:57,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:47:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:47:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:47:57,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:47:57,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57638432] [2022-11-20 10:47:57,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:47:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714705576] [2022-11-20 10:47:57,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714705576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:57,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:57,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:47:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48156475] [2022-11-20 10:47:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:57,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:47:57,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:47:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:57,185 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:47:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:57,210 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-11-20 10:47:57,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:47:57,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-11-20 10:47:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:57,212 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:47:57,212 INFO L226 Difference]: Without dead ends: 26 [2022-11-20 10:47:57,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:47:57,214 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:57,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:47:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-20 10:47:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-20 10:47:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 10:47:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-20 10:47:57,223 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-11-20 10:47:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:57,224 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-20 10:47:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:47:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-20 10:47:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 10:47:57,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:57,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:57,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:57,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:57,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:57,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-11-20 10:47:57,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:57,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121438678] [2022-11-20 10:47:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:57,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:57,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:47:57,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292985491] [2022-11-20 10:47:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:57,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:57,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:57,462 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:57,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:47:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 10:47:57,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:47:57,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:47:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:57,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121438678] [2022-11-20 10:47:57,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:47:57,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292985491] [2022-11-20 10:47:57,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292985491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:47:57,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:47:57,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 10:47:57,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760335774] [2022-11-20 10:47:57,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:57,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:47:57,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:47:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:47:57,997 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:47:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:58,310 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-11-20 10:47:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:47:58,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-20 10:47:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:58,315 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:47:58,316 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 10:47:58,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:47:58,323 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:58,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 122 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:47:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 10:47:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-20 10:47:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:47:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-20 10:47:58,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-11-20 10:47:58,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:58,340 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-20 10:47:58,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 10:47:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-20 10:47:58,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:47:58,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:58,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:58,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:58,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:58,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:58,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-11-20 10:47:58,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:58,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342094707] [2022-11-20 10:47:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:58,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:58,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:47:58,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361129074] [2022-11-20 10:47:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:58,581 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:58,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:47:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 10:47:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:47:58,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:47:58,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:58,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342094707] [2022-11-20 10:47:58,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:47:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361129074] [2022-11-20 10:47:58,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361129074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:47:58,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:47:58,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-20 10:47:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639024518] [2022-11-20 10:47:58,771 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:47:58,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:47:58,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:58,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:47:58,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:47:58,773 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:47:58,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:58,889 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-11-20 10:47:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:47:58,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-11-20 10:47:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:58,895 INFO L225 Difference]: With dead ends: 69 [2022-11-20 10:47:58,895 INFO L226 Difference]: Without dead ends: 57 [2022-11-20 10:47:58,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:47:58,899 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:58,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 139 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:47:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-20 10:47:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-11-20 10:47:58,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:47:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-11-20 10:47:58,923 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-11-20 10:47:58,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:58,930 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-11-20 10:47:58,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:47:58,931 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-11-20 10:47:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:47:58,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:58,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:58,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:59,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:59,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:59,149 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-11-20 10:47:59,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:59,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839717702] [2022-11-20 10:47:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:59,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:59,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:47:59,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46986264] [2022-11-20 10:47:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:59,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:59,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:59,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:47:59,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:47:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:47:59,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:47:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:47:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:47:59,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:47:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:47:59,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:47:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839717702] [2022-11-20 10:47:59,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:47:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46986264] [2022-11-20 10:47:59,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46986264] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:47:59,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:47:59,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-11-20 10:47:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767916587] [2022-11-20 10:47:59,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:47:59,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:47:59,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:47:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:47:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:47:59,687 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:47:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:47:59,725 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-20 10:47:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:47:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-20 10:47:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:47:59,729 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:47:59,729 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 10:47:59,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:47:59,731 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:47:59,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-11-20 10:47:59,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 10:47:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-11-20 10:47:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 10:47:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-20 10:47:59,747 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2022-11-20 10:47:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:47:59,748 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-20 10:47:59,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 10:47:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-20 10:47:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:47:59,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:47:59,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:47:59,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:47:59,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:59,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:47:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:47:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2022-11-20 10:47:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:47:59,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140887985] [2022-11-20 10:47:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:59,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:47:59,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:47:59,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083541505] [2022-11-20 10:47:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:47:59,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:47:59,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:47:59,973 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:00,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:48:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:48:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:48:00,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:48:00,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:00,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140887985] [2022-11-20 10:48:00,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:00,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083541505] [2022-11-20 10:48:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083541505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:00,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:48:00,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-11-20 10:48:00,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515898716] [2022-11-20 10:48:00,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:00,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:48:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:48:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:48:00,164 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:48:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:00,281 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2022-11-20 10:48:00,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 10:48:00,281 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-11-20 10:48:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:00,283 INFO L225 Difference]: With dead ends: 102 [2022-11-20 10:48:00,283 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 10:48:00,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 10:48:00,284 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:00,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 151 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:48:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 10:48:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-11-20 10:48:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 75 states have internal predecessors, (87), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 10:48:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-11-20 10:48:00,308 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 25 [2022-11-20 10:48:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:00,309 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-11-20 10:48:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 10:48:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-11-20 10:48:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:48:00,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:00,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:00,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:48:00,516 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-11-20 10:48:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187405269] [2022-11-20 10:48:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:00,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:00,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286424491] [2022-11-20 10:48:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:00,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:00,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:00,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:48:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:48:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:48:00,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:48:00,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187405269] [2022-11-20 10:48:00,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:00,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286424491] [2022-11-20 10:48:00,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286424491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:48:00,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:48:00,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:48:00,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170582009] [2022-11-20 10:48:00,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:48:00,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:48:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:00,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:48:00,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:00,620 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:48:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:00,660 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-11-20 10:48:00,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:48:00,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-11-20 10:48:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:00,662 INFO L225 Difference]: With dead ends: 121 [2022-11-20 10:48:00,662 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 10:48:00,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:48:00,664 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:00,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:48:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 10:48:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-20 10:48:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 10:48:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-11-20 10:48:00,686 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 31 [2022-11-20 10:48:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:00,687 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-11-20 10:48:00,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:48:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-11-20 10:48:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:48:00,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:00,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:00,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:00,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:48:00,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2022-11-20 10:48:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607656991] [2022-11-20 10:48:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:00,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822613353] [2022-11-20 10:48:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:00,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:00,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:00,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:48:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 10:48:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:48:01,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:48:01,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:01,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607656991] [2022-11-20 10:48:01,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:01,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822613353] [2022-11-20 10:48:01,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822613353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:01,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:48:01,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-20 10:48:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348613310] [2022-11-20 10:48:01,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:01,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:48:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:01,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:48:01,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:48:01,156 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 10:48:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:01,282 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2022-11-20 10:48:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:48:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-20 10:48:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:01,285 INFO L225 Difference]: With dead ends: 87 [2022-11-20 10:48:01,285 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 10:48:01,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:48:01,287 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:01,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:48:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 10:48:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-20 10:48:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 60 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 10:48:01,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-11-20 10:48:01,318 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 31 [2022-11-20 10:48:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:01,319 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-11-20 10:48:01,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 10:48:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-11-20 10:48:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:48:01,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:01,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:01,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:01,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:01,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:01,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:01,532 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-11-20 10:48:01,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:01,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740296825] [2022-11-20 10:48:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:01,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:01,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:01,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816488959] [2022-11-20 10:48:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:01,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:01,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:01,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:01,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:48:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:01,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 10:48:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:48:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:09,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740296825] [2022-11-20 10:48:09,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816488959] [2022-11-20 10:48:09,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816488959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:48:09,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:48:09,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2022-11-20 10:48:09,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100066143] [2022-11-20 10:48:09,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:09,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:48:09,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:48:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=82, Unknown=3, NotChecked=0, Total=110 [2022-11-20 10:48:09,122 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:48:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:09,246 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2022-11-20 10:48:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:48:09,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-20 10:48:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:09,248 INFO L225 Difference]: With dead ends: 98 [2022-11-20 10:48:09,248 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 10:48:09,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=31, Invalid=98, Unknown=3, NotChecked=0, Total=132 [2022-11-20 10:48:09,252 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:09,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:48:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 10:48:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-11-20 10:48:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 64 states have internal predecessors, (70), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 10:48:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2022-11-20 10:48:09,280 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 34 [2022-11-20 10:48:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:09,280 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2022-11-20 10:48:09,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 10:48:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2022-11-20 10:48:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:48:09,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:09,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:09,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:09,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:09,494 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:09,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:09,494 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2022-11-20 10:48:09,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:09,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314530780] [2022-11-20 10:48:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:09,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:09,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101565227] [2022-11-20 10:48:09,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:48:09,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:09,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:09,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:09,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:48:09,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:48:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:48:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:48:09,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:48:10,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:48:11,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:11,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314530780] [2022-11-20 10:48:11,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:11,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101565227] [2022-11-20 10:48:11,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101565227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:11,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:48:11,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-11-20 10:48:11,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277412729] [2022-11-20 10:48:11,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:11,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 10:48:11,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 10:48:11,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:48:11,551 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 10:48:14,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 10:48:14,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:14,593 INFO L93 Difference]: Finished difference Result 114 states and 132 transitions. [2022-11-20 10:48:14,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:48:14,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 43 [2022-11-20 10:48:14,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:14,595 INFO L225 Difference]: With dead ends: 114 [2022-11-20 10:48:14,595 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 10:48:14,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:48:14,596 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 72 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:14,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 166 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 10:48:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 10:48:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2022-11-20 10:48:14,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 10:48:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-11-20 10:48:14,610 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 43 [2022-11-20 10:48:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:14,610 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-11-20 10:48:14,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-20 10:48:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-11-20 10:48:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 10:48:14,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:14,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:14,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:14,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:48:14,818 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2022-11-20 10:48:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:14,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555380637] [2022-11-20 10:48:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:14,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:14,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:14,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979063780] [2022-11-20 10:48:14,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:48:14,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:14,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:14,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:14,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:48:15,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:48:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:48:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:48:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:48:15,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:48:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 10:48:15,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:48:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555380637] [2022-11-20 10:48:15,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:48:15,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979063780] [2022-11-20 10:48:15,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979063780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:48:15,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:48:15,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2022-11-20 10:48:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24202519] [2022-11-20 10:48:15,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:48:15,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:48:15,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:48:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:48:15,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:48:15,319 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 10:48:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:48:15,392 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2022-11-20 10:48:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:48:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 46 [2022-11-20 10:48:15,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:48:15,395 INFO L225 Difference]: With dead ends: 99 [2022-11-20 10:48:15,396 INFO L226 Difference]: Without dead ends: 43 [2022-11-20 10:48:15,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:48:15,397 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:48:15,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 114 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:48:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-20 10:48:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-20 10:48:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:48:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-11-20 10:48:15,409 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 46 [2022-11-20 10:48:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:48:15,409 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-11-20 10:48:15,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-20 10:48:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-11-20 10:48:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 10:48:15,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:48:15,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:48:15,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:48:15,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 10:48:15,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:48:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:48:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2008105021, now seen corresponding path program 1 times [2022-11-20 10:48:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:48:15,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932407963] [2022-11-20 10:48:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:48:15,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:48:15,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399257030] [2022-11-20 10:48:15,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:48:15,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:48:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:48:15,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:48:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:48:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:48:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 10:48:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:48:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:48:36,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:49:36,732 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 30 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:49:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:49:47,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:49:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932407963] [2022-11-20 10:49:47,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:49:47,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399257030] [2022-11-20 10:49:47,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399257030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:49:47,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:49:47,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2022-11-20 10:49:47,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751268820] [2022-11-20 10:49:47,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:49:47,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:49:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:49:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:49:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=411, Unknown=4, NotChecked=0, Total=506 [2022-11-20 10:49:47,974 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:49:50,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:49:54,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:01,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:02,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:05,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:07,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:09,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:11,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:13,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:23,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:25,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:35,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:37,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:38,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:41,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:43,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:46,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:50:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:50:46,451 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-20 10:50:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 10:50:46,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2022-11-20 10:50:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:50:46,453 INFO L225 Difference]: With dead ends: 46 [2022-11-20 10:50:46,453 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 10:50:46,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=111, Invalid=532, Unknown=7, NotChecked=0, Total=650 [2022-11-20 10:50:46,454 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 22 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:50:46,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 334 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 211 Invalid, 9 Unknown, 0 Unchecked, 43.0s Time] [2022-11-20 10:50:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 10:50:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 10:50:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:50:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 10:50:46,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-11-20 10:50:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:50:46,456 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 10:50:46,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 21 states have internal predecessors, (58), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:50:46,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 10:50:46,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 10:50:46,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 10:50:46,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:50:46,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:50:46,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 10:51:12,189 WARN L233 SmtUtils]: Spent 24.41s on a formula simplification. DAG size of input: 107 DAG size of output: 18 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 10:51:27,653 WARN L233 SmtUtils]: Spent 15.46s on a formula simplification. DAG size of input: 155 DAG size of output: 127 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-11-20 10:51:30,103 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 10:51:30,105 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0)) [2022-11-20 10:51:30,105 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (<= 0 ~counter~0) (<= ~counter~0 0) (< (mod |ULTIMATE.start_main_~B~0#1| 4294967296) 2147483647)) [2022-11-20 10:51:30,106 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-11-20 10:51:30,106 INFO L899 garLoopResultBuilder]: For program point L40(lines 40 49) no Hoare annotation was computed. [2022-11-20 10:51:30,106 INFO L895 garLoopResultBuilder]: At program point L40-2(lines 40 49) the Hoare annotation is: (let ((.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (and (<= 1 .cse0) (< .cse0 2147483647) (= (mod |ULTIMATE.start_main_~A~0#1| 4294967296) (mod (+ |ULTIMATE.start_main_~r~0#1| (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~q~0#1|)) 4294967296)))) [2022-11-20 10:51:30,106 INFO L899 garLoopResultBuilder]: For program point L36-1(lines 36 39) no Hoare annotation was computed. [2022-11-20 10:51:30,107 INFO L895 garLoopResultBuilder]: At program point L36-3(lines 36 39) the Hoare annotation is: (let ((.cse4 (mod |ULTIMATE.start_main_~B~0#1| 4294967296))) (let ((.cse0 (<= 1 .cse4)) (.cse1 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse2 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse3 (< .cse4 2147483647))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 3 ~counter~0)) (and (<= .cse4 (mod |ULTIMATE.start_main_~r~0#1| 4294967296)) (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse0 (<= ~counter~0 1) (<= 1 ~counter~0) .cse1 .cse2 .cse3) (and (<= 0 ~counter~0) (<= ~counter~0 0) .cse1 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) (<= 1 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) .cse2 .cse3) (and (<= 2 ~counter~0) .cse0 (= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 2) 0) .cse1 .cse2 .cse3 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0))))) [2022-11-20 10:51:30,107 INFO L899 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2022-11-20 10:51:30,107 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-20 10:51:30,107 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 10:51:30,107 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-20 10:51:30,108 INFO L902 garLoopResultBuilder]: At program point L51(lines 26 52) the Hoare annotation is: true [2022-11-20 10:51:30,108 INFO L899 garLoopResultBuilder]: For program point L45(lines 45 48) no Hoare annotation was computed. [2022-11-20 10:51:30,108 INFO L895 garLoopResultBuilder]: At program point L45-2(lines 26 52) the Hoare annotation is: (let ((.cse19 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse24 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse11 (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse23 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse0 (not (<= .cse19 .cse24))) (.cse16 (* 4294967295 |ULTIMATE.start_main_~b~0#1|)) (.cse7 (mod |ULTIMATE.start_main_~A~0#1| 4294967296))) (let ((.cse8 (* 2 |ULTIMATE.start_main_~r~0#1|)) (.cse9 (- |ULTIMATE.start_main_~A~0#1|)) (.cse10 (* 2 |ULTIMATE.start_main_~A~0#1|)) (.cse14 (or .cse0 (= (mod (let ((.cse26 (div .cse19 2))) (+ |ULTIMATE.start_main_~r~0#1| (* 2 |ULTIMATE.start_main_~q~0#1| .cse26) (* 2 .cse26) .cse16)) 4294967296) .cse7))) (.cse15 (* 4294967295 |ULTIMATE.start_main_~r~0#1|)) (.cse6 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse18 (<= 4 ~counter~0)) (.cse5 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse1 (<= 1 .cse23)) (.cse13 (<= 5 ~counter~0)) (.cse21 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse22 (= .cse11 |ULTIMATE.start_main_~A~0#1|)) (.cse2 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse3 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse4 (< .cse23 2147483647))) (or (and .cse0 .cse1 (= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 2) 0) .cse2 .cse3 .cse4 .cse5 (<= 3 ~counter~0)) (let ((.cse12 (mod (+ .cse15 |ULTIMATE.start_main_~A~0#1| .cse16) 4294967296))) (and (<= (+ .cse6 .cse7 .cse8 1) (+ (* (div (+ 2147483647 |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1| .cse9) 2147483648) 4294967296) .cse10)) (= (mod (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|) 2) 0) (< |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1| 2147483648)) .cse1 (<= .cse11 |ULTIMATE.start_main_~A~0#1|) (= 3 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start_main_~b~0#1| (div .cse12 2)) .cse4 .cse13 .cse14 (<= .cse12 .cse7))) (let ((.cse17 (mod (+ .cse15 |ULTIMATE.start_main_~A~0#1|) 4294967296))) (and .cse1 (<= |ULTIMATE.start_main_~r~0#1| |ULTIMATE.start_main_~A~0#1|) (= (mod (+ |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|) 2) 0) (<= (+ .cse7 .cse8 1) (+ (* 4294967296 (div (+ 2147483647 |ULTIMATE.start_main_~r~0#1| .cse9) 2147483648)) .cse10)) (= 2 |ULTIMATE.start_main_~q~0#1|) (<= .cse17 .cse7) (= (div .cse17 2) |ULTIMATE.start_main_~b~0#1|) .cse4 .cse13 (< |ULTIMATE.start_main_~A~0#1| (+ |ULTIMATE.start_main_~r~0#1| 2147483648)) .cse14)) (and .cse1 .cse2 .cse3 .cse4 .cse18) (let ((.cse20 (mod .cse11 4294967296))) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse1 (<= .cse19 .cse20) (< |ULTIMATE.start_main_~b~0#1| 2147483648) .cse21 .cse22 .cse4 (<= (+ .cse20 1) (+ (* 4294967296 (div (+ 2147483647 (- |ULTIMATE.start_main_~b~0#1|)) 2147483648)) .cse6)) .cse18 .cse5)) (and .cse1 .cse21 .cse22 .cse4 .cse13) (and (<= .cse23 .cse24) .cse0 (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) .cse2 .cse3 .cse4 (<= ~counter~0 2)) (let ((.cse25 (mod |ULTIMATE.start_main_~B~0#1| 2147483648))) (and (< ~counter~0 4) .cse21 .cse22 (= |ULTIMATE.start_main_~b~0#1| .cse25) .cse4 (<= (+ 2147483649 (* (div (- .cse25) 2147483648) 2147483648)) .cse25))) (and .cse0 (<= ~counter~0 1) .cse2 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse3 .cse4))))) [2022-11-20 10:51:30,109 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse14 (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse0 (mod |ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse12 (mod |ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse1 (mod |ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse2 (not (<= .cse12 .cse1))) (.cse6 (<= 1 .cse0)) (.cse9 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse10 (= .cse14 |ULTIMATE.start_main_~A~0#1|)) (.cse8 (<= 5 ~counter~0)) (.cse7 (= (mod |ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse3 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~A~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse5 (< .cse0 2147483647))) (or (and (<= .cse0 .cse1) .cse2 (= |ULTIMATE.start_main_~b~0#1| (* 2 |ULTIMATE.start_main_~B~0#1|)) (< ~counter~0 4) .cse3 .cse4 .cse5) (and .cse2 .cse6 (= (mod (div |ULTIMATE.start_main_~b~0#1| 2) 2) 0) .cse3 .cse4 .cse5 (<= 4 ~counter~0) .cse7) (and .cse6 .cse3 .cse4 .cse5 .cse8) (let ((.cse11 (mod |ULTIMATE.start_main_~B~0#1| 2147483648))) (and .cse9 .cse10 (= |ULTIMATE.start_main_~b~0#1| .cse11) .cse5 (< ~counter~0 5) (<= (+ 2147483649 (* (div (- .cse11) 2147483648) 2147483648)) .cse11))) (let ((.cse13 (mod .cse14 4294967296))) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse6 (<= .cse12 .cse13) (< |ULTIMATE.start_main_~b~0#1| 2147483648) .cse9 .cse10 .cse5 (<= (+ .cse13 1) (+ (* 4294967296 (div (+ 2147483647 (- |ULTIMATE.start_main_~b~0#1|)) 2147483648)) (* 2 |ULTIMATE.start_main_~b~0#1|))) .cse8 .cse7)) (and .cse3 (= |ULTIMATE.start_main_~B~0#1| |ULTIMATE.start_main_~b~0#1|) .cse4 .cse5 (< .cse1 .cse12) (<= ~counter~0 2))))) [2022-11-20 10:51:30,109 INFO L899 garLoopResultBuilder]: For program point L41-1(lines 40 49) no Hoare annotation was computed. [2022-11-20 10:51:30,109 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2022-11-20 10:51:30,109 INFO L899 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2022-11-20 10:51:30,109 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 17) no Hoare annotation was computed. [2022-11-20 10:51:30,110 INFO L902 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 15 17) the Hoare annotation is: true [2022-11-20 10:51:30,110 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 15 17) no Hoare annotation was computed. [2022-11-20 10:51:30,110 INFO L899 garLoopResultBuilder]: For program point L19-2(lines 18 24) no Hoare annotation was computed. [2022-11-20 10:51:30,110 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 24) the Hoare annotation is: true [2022-11-20 10:51:30,110 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 24) no Hoare annotation was computed. [2022-11-20 10:51:30,110 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 21) no Hoare annotation was computed. [2022-11-20 10:51:30,111 INFO L899 garLoopResultBuilder]: For program point L19(lines 19 22) no Hoare annotation was computed. [2022-11-20 10:51:30,111 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2022-11-20 10:51:30,114 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:30,118 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:51:30,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:51:30 BoogieIcfgContainer [2022-11-20 10:51:30,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:51:30,164 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:51:30,164 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:51:30,165 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:51:30,165 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:47:56" (3/4) ... [2022-11-20 10:51:30,168 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 10:51:30,174 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-20 10:51:30,175 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-20 10:51:30,180 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-11-20 10:51:30,180 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-20 10:51:30,180 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-20 10:51:30,181 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 10:51:30,221 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:51:30,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:51:30,222 INFO L158 Benchmark]: Toolchain (without parser) took 214967.54ms. Allocated memory was 136.3MB in the beginning and 195.0MB in the end (delta: 58.7MB). Free memory was 93.2MB in the beginning and 158.0MB in the end (delta: -64.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:51:30,223 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 104.9MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:51:30,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.54ms. Allocated memory is still 136.3MB. Free memory was 92.8MB in the beginning and 82.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:51:30,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.47ms. Allocated memory is still 136.3MB. Free memory was 82.3MB in the beginning and 81.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:51:30,224 INFO L158 Benchmark]: Boogie Preprocessor took 53.33ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 80.0MB in the end (delta: 977.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:51:30,225 INFO L158 Benchmark]: RCFGBuilder took 397.98ms. Allocated memory is still 136.3MB. Free memory was 79.6MB in the beginning and 69.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 10:51:30,225 INFO L158 Benchmark]: TraceAbstraction took 214098.04ms. Allocated memory was 136.3MB in the beginning and 195.0MB in the end (delta: 58.7MB). Free memory was 68.4MB in the beginning and 161.2MB in the end (delta: -92.7MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. [2022-11-20 10:51:30,225 INFO L158 Benchmark]: Witness Printer took 57.51ms. Allocated memory is still 195.0MB. Free memory was 161.2MB in the beginning and 158.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 10:51:30,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 104.9MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 315.54ms. Allocated memory is still 136.3MB. Free memory was 92.8MB in the beginning and 82.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.47ms. Allocated memory is still 136.3MB. Free memory was 82.3MB in the beginning and 81.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.33ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 80.0MB in the end (delta: 977.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 397.98ms. Allocated memory is still 136.3MB. Free memory was 79.6MB in the beginning and 69.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 214098.04ms. Allocated memory was 136.3MB in the beginning and 195.0MB in the end (delta: 58.7MB). Free memory was 68.4MB in the beginning and 161.2MB in the end (delta: -92.7MB). Peak memory consumption was 76.5MB. Max. memory is 16.1GB. * Witness Printer took 57.51ms. Allocated memory is still 195.0MB. Free memory was 161.2MB in the beginning and 158.0MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 21]: 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 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 214.0s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 62.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 43.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 354 SdHoareTripleChecker+Valid, 46.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 349 mSDsluCounter, 1539 SdHoareTripleChecker+Invalid, 46.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27 IncrementalHoareTripleChecker+Unchecked, 1178 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 716 IncrementalHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 361 mSDtfsCounter, 716 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 496 SyntacticMatches, 8 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 58.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=6, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 48 PreInvPairs, 83 NumberOfFragments, 855 HoareAnnotationTreeSize, 48 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 3913 FormulaSimplificationTreeSizeReductionInter, 43.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 10.1s SatisfiabilityAnalysisTime, 94.0s InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 588 ConstructedInterpolants, 9 QuantifiedInterpolants, 3603 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1088 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 19 InterpolantComputations, 5 PerfectInterpolantSequences, 202/267 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 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((((((((((((!(b % 4294967296 <= r % 4294967296) && 1 <= B % 4294967296) && b / 2 % 2 == 0) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b % 2 == 0) && 3 <= counter) || ((((((((((2 * b + A % 4294967296 + 2 * r + 1 <= (2147483647 + b + r + -A) / 2147483648 * 4294967296 + 2 * A && (A + b + r) % 2 == 0) && A < b + r + 2147483648) && 1 <= B % 4294967296) && b + r <= A) && 3 == q) && b == (4294967295 * r + A + 4294967295 * b) % 4294967296 / 2) && B % 4294967296 < 2147483647) && 5 <= counter) && (!(b % 4294967296 <= r % 4294967296) || (r + 2 * q * (b % 4294967296 / 2) + 2 * (b % 4294967296 / 2) + 4294967295 * b) % 4294967296 == A % 4294967296)) && (4294967295 * r + A + 4294967295 * b) % 4294967296 <= A % 4294967296)) || ((((((((((1 <= B % 4294967296 && r <= A) && (A + r) % 2 == 0) && A % 4294967296 + 2 * r + 1 <= 4294967296 * ((2147483647 + r + -A) / 2147483648) + 2 * A) && 2 == q) && (4294967295 * r + A) % 4294967296 <= A % 4294967296) && (4294967295 * r + A) % 4294967296 / 2 == b) && B % 4294967296 < 2147483647) && 5 <= counter) && A < r + 2147483648) && (!(b % 4294967296 <= r % 4294967296) || (r + 2 * q * (b % 4294967296 / 2) + 2 * (b % 4294967296 / 2) + 4294967295 * b) % 4294967296 == A % 4294967296))) || ((((1 <= B % 4294967296 && q == 0) && A == r) && B % 4294967296 < 2147483647) && 4 <= counter)) || (((((((((0 <= b && 1 <= B % 4294967296) && b % 4294967296 <= (b + r) % 4294967296) && b < 2147483648) && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && (b + r) % 4294967296 + 1 <= 4294967296 * ((2147483647 + -b) / 2147483648) + 2 * b) && 4 <= counter) && b % 2 == 0)) || ((((1 <= B % 4294967296 && q == 1) && b + r == A) && B % 4294967296 < 2147483647) && 5 <= counter)) || ((((((B % 4294967296 <= r % 4294967296 && !(b % 4294967296 <= r % 4294967296)) && b == 2 * B) && q == 0) && A == r) && B % 4294967296 < 2147483647) && counter <= 2)) || (((((counter < 4 && q == 1) && b + r == A) && b == B % 2147483648) && B % 4294967296 < 2147483647) && 2147483649 + -(B % 2147483648) / 2147483648 * 2147483648 <= B % 2147483648)) || (((((!(b % 4294967296 <= r % 4294967296) && counter <= 1) && q == 0) && B == b) && A == r) && B % 4294967296 < 2147483647) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((1 <= B % 4294967296 && q == 0) && A == r) && B % 4294967296 < 2147483647) && 3 <= counter) || (((((((B % 4294967296 <= r % 4294967296 && b == 2 * B) && 1 <= B % 4294967296) && counter <= 1) && 1 <= counter) && q == 0) && A == r) && B % 4294967296 < 2147483647)) || ((((((0 <= counter && counter <= 0) && q == 0) && B == b) && 1 <= b % 4294967296) && A == r) && B % 4294967296 < 2147483647)) || ((((((2 <= counter && 1 <= B % 4294967296) && b / 2 % 2 == 0) && q == 0) && A == r) && B % 4294967296 < 2147483647) && b % 2 == 0) RESULT: Ultimate proved your program to be correct! [2022-11-20 10:51:30,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbf0eff7-d83e-4ee0-b9e3-8a82de0e3ac8/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE