./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/rev-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G --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 fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:37:12,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:37:12,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:37:12,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:37:12,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:37:12,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:37:12,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:37:12,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:37:12,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:37:12,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:37:12,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:37:12,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:37:12,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:37:12,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:37:12,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:37:12,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:37:12,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:37:12,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:37:12,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:37:12,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:37:12,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:37:12,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:37:12,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:37:12,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:37:12,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:37:12,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:37:12,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:37:12,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:37:12,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:37:12,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:37:12,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:37:12,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:37:12,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:37:12,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:37:12,701 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:37:12,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:37:12,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:37:12,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:37:12,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:37:12,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:37:12,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:37:12,708 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 13:37:12,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:37:12,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:37:12,738 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:37:12,739 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:37:12,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:37:12,741 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:37:12,741 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:37:12,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:37:12,742 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:37:12,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:37:12,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:37:12,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:37:12,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 13:37:12,745 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:37:12,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 13:37:12,746 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:37:12,746 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 13:37:12,747 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:37:12,747 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 13:37:12,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:37:12,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:37:12,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:37:12,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:37:12,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:37:12,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:37:12,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 13:37:12,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:37:12,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:37:12,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 13:37:12,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 13:37:12,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 13:37:12,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:37:12,757 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_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe3cf414f0e241a9a4e73e59647cf6619ea50b905df4a1c2a404b3413992b780 [2021-11-23 13:37:13,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:37:13,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:37:13,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:37:13,135 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:37:13,136 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:37:13,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-multidimensional/rev-3-u.c [2021-11-23 13:37:13,247 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/data/b3e134874/86b935af0f3d406bb5a1ae3594dbf9fe/FLAGda5e7e3e4 [2021-11-23 13:37:13,809 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:37:13,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/sv-benchmarks/c/array-multidimensional/rev-3-u.c [2021-11-23 13:37:13,822 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/data/b3e134874/86b935af0f3d406bb5a1ae3594dbf9fe/FLAGda5e7e3e4 [2021-11-23 13:37:14,169 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/data/b3e134874/86b935af0f3d406bb5a1ae3594dbf9fe [2021-11-23 13:37:14,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:37:14,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:37:14,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:37:14,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:37:14,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:37:14,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503cb02c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14, skipping insertion in model container [2021-11-23 13:37:14,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:37:14,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:37:14,431 WARN L230 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_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2021-11-23 13:37:14,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:37:14,499 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:37:14,515 WARN L230 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_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/sv-benchmarks/c/array-multidimensional/rev-3-u.c[319,332] [2021-11-23 13:37:14,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:37:14,547 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:37:14,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14 WrapperNode [2021-11-23 13:37:14,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:37:14,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:37:14,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:37:14,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:37:14,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,591 INFO L137 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 106 [2021-11-23 13:37:14,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:37:14,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:37:14,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:37:14,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:37:14,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:37:14,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:37:14,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:37:14,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:37:14,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (1/1) ... [2021-11-23 13:37:14,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:37:14,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:14,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:37:14,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:37:14,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:37:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:37:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:37:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:37:14,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:37:14,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:37:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:37:14,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:37:14,849 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:37:14,852 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:37:15,115 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:37:15,127 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:37:15,127 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-23 13:37:15,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:37:15 BoogieIcfgContainer [2021-11-23 13:37:15,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:37:15,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:37:15,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:37:15,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:37:15,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:37:14" (1/3) ... [2021-11-23 13:37:15,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789d91c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:37:15, skipping insertion in model container [2021-11-23 13:37:15,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:37:14" (2/3) ... [2021-11-23 13:37:15,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@789d91c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:37:15, skipping insertion in model container [2021-11-23 13:37:15,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:37:15" (3/3) ... [2021-11-23 13:37:15,143 INFO L111 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2021-11-23 13:37:15,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:37:15,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 13:37:15,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:37:15,236 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 13:37:15,236 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 13:37:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:37:15,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:15,263 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:15,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-11-23 13:37:15,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:15,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675304754] [2021-11-23 13:37:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:15,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:15,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348627635] [2021-11-23 13:37:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:15,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:15,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:15,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:15,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:37:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 13:37:15,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:15,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:15,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:37:15,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675304754] [2021-11-23 13:37:15,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:15,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348627635] [2021-11-23 13:37:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348627635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:37:15,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:37:15,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:37:15,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139859002] [2021-11-23 13:37:15,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:37:15,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:37:15,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:15,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:37:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:37:15,673 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:15,696 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-11-23 13:37:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:37:15,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 11 [2021-11-23 13:37:15,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:15,708 INFO L225 Difference]: With dead ends: 52 [2021-11-23 13:37:15,709 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 13:37:15,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:37:15,734 INFO L933 BasicCegarLoop]: 35 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, 35 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 [2021-11-23 13:37:15,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:37:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 13:37:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 13:37:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-23 13:37:15,805 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-11-23 13:37:15,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:15,806 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-23 13:37:15,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-23 13:37:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:37:15,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:15,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:15,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:16,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 13:37:16,035 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:16,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-11-23 13:37:16,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:16,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325952189] [2021-11-23 13:37:16,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:16,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:16,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695501202] [2021-11-23 13:37:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:16,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:16,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:16,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:37:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:16,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:37:16,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:16,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:37:16,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:16,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325952189] [2021-11-23 13:37:16,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:16,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695501202] [2021-11-23 13:37:16,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695501202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:37:16,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:37:16,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:37:16,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880427495] [2021-11-23 13:37:16,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:37:16,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:37:16,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:37:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:37:16,273 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:16,389 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-11-23 13:37:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:37:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2021-11-23 13:37:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:16,393 INFO L225 Difference]: With dead ends: 44 [2021-11-23 13:37:16,393 INFO L226 Difference]: Without dead ends: 28 [2021-11-23 13:37:16,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:37:16,396 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:16,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-23 13:37:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-11-23 13:37:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2021-11-23 13:37:16,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2021-11-23 13:37:16,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:16,406 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2021-11-23 13:37:16,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2021-11-23 13:37:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:37:16,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:16,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:16,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:16,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 13:37:16,631 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2021-11-23 13:37:16,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:16,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833868274] [2021-11-23 13:37:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:16,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:16,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:16,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540112167] [2021-11-23 13:37:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:16,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:16,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:16,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:16,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:37:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:37:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:16,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:37:16,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:16,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833868274] [2021-11-23 13:37:16,879 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:16,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540112167] [2021-11-23 13:37:16,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540112167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:37:16,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:37:16,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:37:16,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726997541] [2021-11-23 13:37:16,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:37:16,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:37:16,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:16,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:37:16,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:16,883 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:16,999 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2021-11-23 13:37:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:37:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) Word has length 14 [2021-11-23 13:37:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:17,001 INFO L225 Difference]: With dead ends: 61 [2021-11-23 13:37:17,001 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 13:37:17,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:17,004 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:17,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 13:37:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2021-11-23 13:37:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-23 13:37:17,015 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2021-11-23 13:37:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:17,016 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-23 13:37:17,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-23 13:37:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:37:17,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:17,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:17,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:17,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:17,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2021-11-23 13:37:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:17,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931438724] [2021-11-23 13:37:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:17,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:17,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:17,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112139419] [2021-11-23 13:37:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:17,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:17,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:17,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:37:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:17,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:37:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:17,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:37:17,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931438724] [2021-11-23 13:37:17,434 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112139419] [2021-11-23 13:37:17,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112139419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:37:17,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:37:17,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:37:17,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056796296] [2021-11-23 13:37:17,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:37:17,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:37:17,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:37:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:17,438 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:17,524 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-11-23 13:37:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:37:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 17 [2021-11-23 13:37:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:17,526 INFO L225 Difference]: With dead ends: 61 [2021-11-23 13:37:17,526 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 13:37:17,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:17,529 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:17,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:17,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 13:37:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-23 13:37:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-23 13:37:17,540 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-11-23 13:37:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:17,541 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-23 13:37:17,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-23 13:37:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:37:17,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:17,543 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:17,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:17,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:17,751 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:17,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2021-11-23 13:37:17,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:17,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595669169] [2021-11-23 13:37:17,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:17,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:17,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:17,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069761762] [2021-11-23 13:37:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:17,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:17,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:17,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:37:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:37:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:17,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:37:18,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595669169] [2021-11-23 13:37:18,047 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069761762] [2021-11-23 13:37:18,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069761762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:18,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:18,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 13:37:18,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329686601] [2021-11-23 13:37:18,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:18,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:37:18,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:37:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:37:18,051 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:18,227 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2021-11-23 13:37:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:37:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) Word has length 18 [2021-11-23 13:37:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:18,230 INFO L225 Difference]: With dead ends: 81 [2021-11-23 13:37:18,230 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 13:37:18,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:37:18,237 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:18,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 43 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 13:37:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2021-11-23 13:37:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-23 13:37:18,267 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2021-11-23 13:37:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:18,268 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-23 13:37:18,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-23 13:37:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 13:37:18,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:18,269 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:18,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:18,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:18,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:18,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:18,471 INFO L85 PathProgramCache]: Analyzing trace with hash 988124671, now seen corresponding path program 2 times [2021-11-23 13:37:18,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780794060] [2021-11-23 13:37:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:18,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:18,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:18,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922771302] [2021-11-23 13:37:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:37:18,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:18,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:18,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:37:18,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-23 13:37:18,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:18,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 13:37:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 13:37:18,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:37:18,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:18,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780794060] [2021-11-23 13:37:18,613 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:18,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922771302] [2021-11-23 13:37:18,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922771302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:37:18,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:37:18,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:37:18,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501233113] [2021-11-23 13:37:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:37:18,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:37:18,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:37:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:18,617 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:18,724 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2021-11-23 13:37:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:37:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) Word has length 21 [2021-11-23 13:37:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:18,738 INFO L225 Difference]: With dead ends: 105 [2021-11-23 13:37:18,739 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 13:37:18,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:37:18,744 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:18,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 13:37:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-11-23 13:37:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-11-23 13:37:18,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2021-11-23 13:37:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:18,771 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-11-23 13:37:18,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-11-23 13:37:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 13:37:18,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:18,773 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:18,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:18,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 13:37:18,999 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:19,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 1 times [2021-11-23 13:37:19,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:19,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510700002] [2021-11-23 13:37:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:19,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:19,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:19,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850951642] [2021-11-23 13:37:19,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:19,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:19,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:19,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:37:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:37:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 13:37:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 13:37:19,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 13:37:19,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510700002] [2021-11-23 13:37:19,405 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:19,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850951642] [2021-11-23 13:37:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850951642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:19,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:19,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-11-23 13:37:19,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872321229] [2021-11-23 13:37:19,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:19,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 13:37:19,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 13:37:19,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:37:19,412 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:19,725 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2021-11-23 13:37:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:37:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 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) Word has length 31 [2021-11-23 13:37:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:19,728 INFO L225 Difference]: With dead ends: 138 [2021-11-23 13:37:19,728 INFO L226 Difference]: Without dead ends: 95 [2021-11-23 13:37:19,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-11-23 13:37:19,730 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 149 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:19,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 49 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-23 13:37:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2021-11-23 13:37:19,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:19,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-11-23 13:37:19,747 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2021-11-23 13:37:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-11-23 13:37:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-11-23 13:37:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:37:19,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:19,750 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:19,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:19,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:19,972 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2141491421, now seen corresponding path program 2 times [2021-11-23 13:37:19,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:19,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526546228] [2021-11-23 13:37:19,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:19,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:19,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:19,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65435118] [2021-11-23 13:37:19,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:37:19,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:19,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:20,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:37:20,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:37:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:37:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 13:37:20,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-23 13:37:20,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526546228] [2021-11-23 13:37:20,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65435118] [2021-11-23 13:37:20,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65435118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:20,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:20,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-23 13:37:20,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661114611] [2021-11-23 13:37:20,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:20,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:37:20,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:37:20,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:37:20,770 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:21,535 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2021-11-23 13:37:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 13:37:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 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) Word has length 43 [2021-11-23 13:37:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:21,542 INFO L225 Difference]: With dead ends: 252 [2021-11-23 13:37:21,542 INFO L226 Difference]: Without dead ends: 179 [2021-11-23 13:37:21,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:37:21,547 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 418 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:21,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 91 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 13:37:21,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-23 13:37:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2021-11-23 13:37:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 135 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2021-11-23 13:37:21,609 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 43 [2021-11-23 13:37:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:21,609 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2021-11-23 13:37:21,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:21,610 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2021-11-23 13:37:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 13:37:21,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:21,619 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:21,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:21,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:37:21,837 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash 587853597, now seen corresponding path program 3 times [2021-11-23 13:37:21,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:21,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740524361] [2021-11-23 13:37:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:21,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:21,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:21,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792135604] [2021-11-23 13:37:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:37:21,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:21,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:21,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:37:21,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 13:37:21,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 13:37:21,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2021-11-23 13:37:22,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2021-11-23 13:37:22,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740524361] [2021-11-23 13:37:22,409 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:22,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792135604] [2021-11-23 13:37:22,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792135604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:22,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:22,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-23 13:37:22,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676510898] [2021-11-23 13:37:22,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:22,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:37:22,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:22,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:37:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:37:22,412 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:22,616 INFO L93 Difference]: Finished difference Result 632 states and 774 transitions. [2021-11-23 13:37:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:37:22,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 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) Word has length 67 [2021-11-23 13:37:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:22,621 INFO L225 Difference]: With dead ends: 632 [2021-11-23 13:37:22,621 INFO L226 Difference]: Without dead ends: 527 [2021-11-23 13:37:22,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:37:22,623 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:22,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:37:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-23 13:37:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 304. [2021-11-23 13:37:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 303 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2021-11-23 13:37:22,675 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 67 [2021-11-23 13:37:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:22,676 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2021-11-23 13:37:22,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2021-11-23 13:37:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-23 13:37:22,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:22,682 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:22,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:22,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:22,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1854973743, now seen corresponding path program 4 times [2021-11-23 13:37:22,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750022924] [2021-11-23 13:37:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:22,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:22,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579108934] [2021-11-23 13:37:22,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:37:22,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:22,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:37:23,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:37:23,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:37:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 13:37:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:37:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8472 backedges. 196 proven. 1603 refuted. 0 times theorem prover too weak. 6673 trivial. 0 not checked. [2021-11-23 13:37:23,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:37:24,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8472 backedges. 196 proven. 1603 refuted. 0 times theorem prover too weak. 6673 trivial. 0 not checked. [2021-11-23 13:37:24,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:37:24,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750022924] [2021-11-23 13:37:24,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 13:37:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579108934] [2021-11-23 13:37:24,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579108934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:37:24,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 13:37:24,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-23 13:37:24,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320549528] [2021-11-23 13:37:24,230 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 13:37:24,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:37:24,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:37:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:37:24,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:37:24,233 INFO L87 Difference]: Start difference. First operand 304 states and 345 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:37:24,585 INFO L93 Difference]: Finished difference Result 1160 states and 1311 transitions. [2021-11-23 13:37:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:37:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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) Word has length 235 [2021-11-23 13:37:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:37:24,594 INFO L225 Difference]: With dead ends: 1160 [2021-11-23 13:37:24,594 INFO L226 Difference]: Without dead ends: 849 [2021-11-23 13:37:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:37:24,598 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:37:24,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 61 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:37:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-23 13:37:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 581. [2021-11-23 13:37:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 580 states have (on average 1.1293103448275863) internal successors, (655), 580 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 655 transitions. [2021-11-23 13:37:24,705 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 655 transitions. Word has length 235 [2021-11-23 13:37:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:37:24,705 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 655 transitions. [2021-11-23 13:37:24,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:37:24,706 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 655 transitions. [2021-11-23 13:37:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-11-23 13:37:24,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:37:24,724 INFO L514 BasicCegarLoop]: trace histogram [176, 154, 8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:37:24,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:37:24,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:24,935 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 13:37:24,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:37:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash -765694528, now seen corresponding path program 5 times [2021-11-23 13:37:24,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:37:24,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639410395] [2021-11-23 13:37:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:37:24,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:37:24,971 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 13:37:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570486227] [2021-11-23 13:37:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:37:24,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:37:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:37:24,974 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:37:24,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90e9502-a3a5-4c38-a2d6-38b22d3efc2e/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process