./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8 --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 c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:01:40,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:01:40,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:01:40,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:01:40,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:01:40,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:01:40,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:01:40,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:01:40,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:01:40,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:01:40,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:01:40,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:01:40,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:01:40,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:01:40,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:01:40,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:01:40,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:01:40,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:01:40,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:01:40,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:01:40,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:01:40,741 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:01:40,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:01:40,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:01:40,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:01:40,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:01:40,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:01:40,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:01:40,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:01:40,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:01:40,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:01:40,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:01:40,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:01:40,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:01:40,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:01:40,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:01:40,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:01:40,750 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:01:40,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:01:40,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:01:40,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:01:40,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 22:01:40,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:01:40,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:01:40,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:01:40,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:01:40,766 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:01:40,766 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:01:40,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:01:40,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:01:40,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 22:01:40,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:01:40,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:01:40,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:01:40,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 22:01:40,770 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:01:40,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:01:40,770 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:01:40,770 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 [2022-12-13 22:01:40,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:01:40,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:01:40,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:01:40,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:01:40,959 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:01:40,960 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-12-13 22:01:43,601 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:01:43,795 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:01:43,796 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-12-13 22:01:43,800 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/data/881d0288d/dba851bd390a4aa89aed64d8f8dc5a6a/FLAG71c1bb033 [2022-12-13 22:01:43,810 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/data/881d0288d/dba851bd390a4aa89aed64d8f8dc5a6a [2022-12-13 22:01:43,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:01:43,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:01:43,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:01:43,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:01:43,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:01:43,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:43,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263d1aec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43, skipping insertion in model container [2022-12-13 22:01:43,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:43,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:01:43,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:01:43,935 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2022-12-13 22:01:43,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:01:43,952 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:01:43,963 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c[318,331] [2022-12-13 22:01:43,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:01:43,977 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:01:43,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43 WrapperNode [2022-12-13 22:01:43,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:01:43,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:01:43,979 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:01:43,979 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:01:43,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:43,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,000 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-12-13 22:01:44,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:01:44,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:01:44,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:01:44,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:01:44,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:01:44,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:01:44,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:01:44,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:01:44,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (1/1) ... [2022-12-13 22:01:44,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:01:44,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:44,037 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:01:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:01:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:01:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:01:44,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:01:44,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:01:44,125 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:01:44,126 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:01:44,182 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:01:44,186 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:01:44,186 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 22:01:44,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:01:44 BoogieIcfgContainer [2022-12-13 22:01:44,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:01:44,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:01:44,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:01:44,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:01:44,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:01:43" (1/3) ... [2022-12-13 22:01:44,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3bc27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:01:44, skipping insertion in model container [2022-12-13 22:01:44,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:01:43" (2/3) ... [2022-12-13 22:01:44,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f3bc27b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:01:44, skipping insertion in model container [2022-12-13 22:01:44,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:01:44" (3/3) ... [2022-12-13 22:01:44,195 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-12-13 22:01:44,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:01:44,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 22:01:44,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:01:44,250 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@596245c0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:01:44,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 22:01:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 22:01:44,258 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:44,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:01:44,259 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:44,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-12-13 22:01:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:44,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581736084] [2022-12-13 22:01:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:01:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:44,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581736084] [2022-12-13 22:01:44,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581736084] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:01:44,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:01:44,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:01:44,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259696331] [2022-12-13 22:01:44,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:01:44,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 22:01:44,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:44,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 22:01:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:01:44,422 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:44,435 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-13 22:01:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 22:01:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-12-13 22:01:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:44,442 INFO L225 Difference]: With dead ends: 20 [2022-12-13 22:01:44,442 INFO L226 Difference]: Without dead ends: 8 [2022-12-13 22:01:44,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 22:01:44,446 INFO L413 NwaCegarLoop]: 13 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, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:44,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:44,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-13 22:01:44,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-13 22:01:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-13 22:01:44,469 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-12-13 22:01:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:44,469 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-13 22:01:44,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-13 22:01:44,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 22:01:44,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:44,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 22:01:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:01:44,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:44,471 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-12-13 22:01:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:44,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782908157] [2022-12-13 22:01:44,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:44,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:01:44,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:44,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782908157] [2022-12-13 22:01:44,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782908157] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:01:44,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:01:44,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:01:44,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780364965] [2022-12-13 22:01:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:01:44,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:01:44,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:01:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:01:44,527 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:44,542 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-12-13 22:01:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:01:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-12-13 22:01:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:44,543 INFO L225 Difference]: With dead ends: 16 [2022-12-13 22:01:44,544 INFO L226 Difference]: Without dead ends: 10 [2022-12-13 22:01:44,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:01:44,545 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:44,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-13 22:01:44,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-13 22:01:44,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-12-13 22:01:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-13 22:01:44,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-12-13 22:01:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:44,549 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-13 22:01:44,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-13 22:01:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 22:01:44,550 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:44,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 22:01:44,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:44,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:44,551 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-12-13 22:01:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482974673] [2022-12-13 22:01:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:01:44,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482974673] [2022-12-13 22:01:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482974673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:44,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78353666] [2022-12-13 22:01:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:44,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:44,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:01:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:44,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:01:44,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:01:44,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:01:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78353666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:44,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:44,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 22:01:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149905434] [2022-12-13 22:01:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:44,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:01:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:01:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:01:44,712 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:44,746 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-12-13 22:01:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:01:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 8 [2022-12-13 22:01:44,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:44,747 INFO L225 Difference]: With dead ends: 21 [2022-12-13 22:01:44,747 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 22:01:44,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:01:44,749 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:44,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 22:01:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 22:01:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2022-12-13 22:01:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-13 22:01:44,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-12-13 22:01:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:44,755 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-13 22:01:44,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:44,755 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-13 22:01:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 22:01:44,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:44,756 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:44,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:01:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:44,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash 598153473, now seen corresponding path program 1 times [2022-12-13 22:01:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:44,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006700108] [2022-12-13 22:01:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:45,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006700108] [2022-12-13 22:01:45,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006700108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749686505] [2022-12-13 22:01:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:45,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:45,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:45,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:01:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:45,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:01:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749686505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:45,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:45,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 22:01:45,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507249502] [2022-12-13 22:01:45,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 22:01:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 22:01:45,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:01:45,240 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:45,270 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-12-13 22:01:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:01:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 [2022-12-13 22:01:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:45,271 INFO L225 Difference]: With dead ends: 32 [2022-12-13 22:01:45,271 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 22:01:45,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:01:45,272 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:45,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 22:01:45,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 22:01:45,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-12-13 22:01:45,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-12-13 22:01:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:45,276 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-12-13 22:01:45,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,276 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-12-13 22:01:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 22:01:45,276 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:45,276 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:45,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:01:45,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:45,478 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 2 times [2022-12-13 22:01:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770505013] [2022-12-13 22:01:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:45,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770505013] [2022-12-13 22:01:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770505013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440925494] [2022-12-13 22:01:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:01:45,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:45,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:45,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:45,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:01:45,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:01:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:01:45,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:01:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:45,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440925494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:45,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:45,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-13 22:01:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200361134] [2022-12-13 22:01:45,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:45,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:01:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:45,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:01:45,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:01:45,837 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:45,870 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-12-13 22:01:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 22:01:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 22 [2022-12-13 22:01:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:45,870 INFO L225 Difference]: With dead ends: 48 [2022-12-13 22:01:45,870 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 22:01:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:01:45,871 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 22:01:45,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-13 22:01:45,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-12-13 22:01:45,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2022-12-13 22:01:45,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:45,876 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-12-13 22:01:45,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:45,877 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-12-13 22:01:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 22:01:45,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:45,878 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:45,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 22:01:46,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:46,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash -713215707, now seen corresponding path program 3 times [2022-12-13 22:01:46,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:46,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972733109] [2022-12-13 22:01:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:46,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:01:46,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:46,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972733109] [2022-12-13 22:01:46,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972733109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:46,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982939605] [2022-12-13 22:01:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:01:46,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:46,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:46,441 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:46,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:01:46,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:01:46,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:01:46,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:01:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-13 22:01:46,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-12-13 22:01:46,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982939605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:46,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:46,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-12-13 22:01:46,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622481522] [2022-12-13 22:01:46,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:46,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 22:01:46,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:46,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 22:01:46,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:01:46,583 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:46,644 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-12-13 22:01:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 22:01:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-13 22:01:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:46,646 INFO L225 Difference]: With dead ends: 58 [2022-12-13 22:01:46,646 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 22:01:46,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-13 22:01:46,647 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:46,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 22:01:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 22:01:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-13 22:01:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-12-13 22:01:46,652 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 38 [2022-12-13 22:01:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:46,652 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-12-13 22:01:46,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-12-13 22:01:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 22:01:46,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:46,653 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:46,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:01:46,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 22:01:46,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash 160479836, now seen corresponding path program 4 times [2022-12-13 22:01:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669647543] [2022-12-13 22:01:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:46,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:47,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669647543] [2022-12-13 22:01:47,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669647543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77884325] [2022-12-13 22:01:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:01:47,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:47,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:47,168 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:01:47,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:01:47,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:01:47,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:01:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:47,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:47,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77884325] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:47,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:47,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-12-13 22:01:47,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746002833] [2022-12-13 22:01:47,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 22:01:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 22:01:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 22:01:47,603 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:47,708 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2022-12-13 22:01:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 22:01:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-13 22:01:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:47,710 INFO L225 Difference]: With dead ends: 100 [2022-12-13 22:01:47,710 INFO L226 Difference]: Without dead ends: 83 [2022-12-13 22:01:47,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 22:01:47,711 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:01:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-13 22:01:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-12-13 22:01:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-12-13 22:01:47,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 48 [2022-12-13 22:01:47,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:47,718 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-12-13 22:01:47,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-12-13 22:01:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 22:01:47,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:47,721 INFO L195 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:47,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:01:47,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 22:01:47,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash 722625007, now seen corresponding path program 5 times [2022-12-13 22:01:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093733750] [2022-12-13 22:01:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:47,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:48,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:48,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093733750] [2022-12-13 22:01:48,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093733750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562760103] [2022-12-13 22:01:48,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:01:48,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:48,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:48,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:01:48,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-12-13 22:01:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:01:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 22:01:48,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:48,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:49,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562760103] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:49,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:49,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-12-13 22:01:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854640853] [2022-12-13 22:01:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:49,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 22:01:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 22:01:49,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 22:01:49,752 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:49,967 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2022-12-13 22:01:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-13 22:01:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 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 82 [2022-12-13 22:01:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:49,969 INFO L225 Difference]: With dead ends: 168 [2022-12-13 22:01:49,969 INFO L226 Difference]: Without dead ends: 151 [2022-12-13 22:01:49,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 22:01:49,971 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:49,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:01:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-13 22:01:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-12-13 22:01:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:49,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2022-12-13 22:01:49,986 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 82 [2022-12-13 22:01:49,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:49,986 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2022-12-13 22:01:49,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:49,986 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2022-12-13 22:01:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-13 22:01:49,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:49,988 INFO L195 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:49,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 22:01:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:50,190 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:50,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash -682364203, now seen corresponding path program 6 times [2022-12-13 22:01:50,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:50,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436355112] [2022-12-13 22:01:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:50,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 22:01:51,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436355112] [2022-12-13 22:01:51,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436355112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:51,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782291249] [2022-12-13 22:01:51,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 22:01:51,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:51,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:51,943 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:51,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:01:51,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-12-13 22:01:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:01:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:01:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-12-13 22:01:52,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-12-13 22:01:52,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782291249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:52,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:52,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 9] total 83 [2022-12-13 22:01:52,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038865611] [2022-12-13 22:01:52,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:52,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 22:01:52,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 22:01:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 22:01:52,536 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:52,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:52,749 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2022-12-13 22:01:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 22:01:52,750 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 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 150 [2022-12-13 22:01:52,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:52,752 INFO L225 Difference]: With dead ends: 186 [2022-12-13 22:01:52,752 INFO L226 Difference]: Without dead ends: 169 [2022-12-13 22:01:52,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 22:01:52,755 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:52,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:01:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-13 22:01:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-12-13 22:01:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 168 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-12-13 22:01:52,763 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 150 [2022-12-13 22:01:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:52,763 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-12-13 22:01:52,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:52,763 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-12-13 22:01:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-13 22:01:52,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:52,765 INFO L195 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:52,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 22:01:52,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:52,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1511260128, now seen corresponding path program 7 times [2022-12-13 22:01:52,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:52,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879372489] [2022-12-13 22:01:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:52,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:01:54,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:01:54,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879372489] [2022-12-13 22:01:54,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879372489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:01:54,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193572472] [2022-12-13 22:01:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 22:01:54,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:01:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:01:54,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:01:54,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:01:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:01:54,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 22:01:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:01:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:01:55,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:01:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:01:58,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193572472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:01:58,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:01:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-12-13 22:01:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179563435] [2022-12-13 22:01:58,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:01:58,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-12-13 22:01:58,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:01:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-12-13 22:01:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-12-13 22:01:58,509 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:58,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:01:58,787 INFO L93 Difference]: Finished difference Result 340 states and 437 transitions. [2022-12-13 22:01:58,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-12-13 22:01:58,788 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 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 168 [2022-12-13 22:01:58,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:01:58,790 INFO L225 Difference]: With dead ends: 340 [2022-12-13 22:01:58,790 INFO L226 Difference]: Without dead ends: 307 [2022-12-13 22:01:58,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-12-13 22:01:58,793 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:01:58,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 22:01:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-12-13 22:01:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-12-13 22:01:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0490196078431373) internal successors, (321), 306 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 321 transitions. [2022-12-13 22:01:58,803 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 321 transitions. Word has length 168 [2022-12-13 22:01:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:01:58,804 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 321 transitions. [2022-12-13 22:01:58,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:01:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 321 transitions. [2022-12-13 22:01:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-12-13 22:01:58,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:01:58,806 INFO L195 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1] [2022-12-13 22:01:58,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:01:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 22:01:59,008 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:01:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:01:59,010 INFO L85 PathProgramCache]: Analyzing trace with hash 55731535, now seen corresponding path program 8 times [2022-12-13 22:01:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:01:59,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898149604] [2022-12-13 22:01:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:01:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:01:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:02:06,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:02:06,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:02:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898149604] [2022-12-13 22:02:06,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898149604] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:02:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085537428] [2022-12-13 22:02:06,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:02:06,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:02:06,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:02:06,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:02:06,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:02:06,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:02:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:02:06,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-13 22:02:06,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:02:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:02:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:02:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:02:19,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085537428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:02:19,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:02:19,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-12-13 22:02:19,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093243053] [2022-12-13 22:02:19,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:02:19,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-12-13 22:02:19,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:02:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-12-13 22:02:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-12-13 22:02:19,312 INFO L87 Difference]: Start difference. First operand 307 states and 321 transitions. Second operand has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:02:20,832 INFO L93 Difference]: Finished difference Result 616 states and 782 transitions. [2022-12-13 22:02:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-12-13 22:02:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 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 306 [2022-12-13 22:02:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:02:20,837 INFO L225 Difference]: With dead ends: 616 [2022-12-13 22:02:20,837 INFO L226 Difference]: Without dead ends: 583 [2022-12-13 22:02:20,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-12-13 22:02:20,841 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 22:02:20,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 22:02:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-12-13 22:02:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-12-13 22:02:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.0257731958762886) internal successors, (597), 582 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 597 transitions. [2022-12-13 22:02:20,856 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 597 transitions. Word has length 306 [2022-12-13 22:02:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:02:20,856 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 597 transitions. [2022-12-13 22:02:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 597 transitions. [2022-12-13 22:02:20,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-12-13 22:02:20,864 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:02:20,864 INFO L195 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1] [2022-12-13 22:02:20,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:02:21,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:02:21,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:02:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:02:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1666677907, now seen corresponding path program 9 times [2022-12-13 22:02:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:02:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041587863] [2022-12-13 22:02:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:02:21,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:02:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:02:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-12-13 22:02:49,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:02:49,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041587863] [2022-12-13 22:02:49,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041587863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:02:49,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735093623] [2022-12-13 22:02:49,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:02:49,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:02:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:02:49,861 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:02:49,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:02:49,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-13 22:02:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:02:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:02:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:02:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-12-13 22:02:51,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:02:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-12-13 22:02:53,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735093623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:02:53,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:02:53,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 17, 17] total 307 [2022-12-13 22:02:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339332372] [2022-12-13 22:02:53,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:02:53,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 307 states [2022-12-13 22:02:53,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:02:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 307 interpolants. [2022-12-13 22:02:53,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-12-13 22:02:53,983 INFO L87 Difference]: Start difference. First operand 583 states and 597 transitions. Second operand has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:02:56,876 INFO L93 Difference]: Finished difference Result 650 states and 711 transitions. [2022-12-13 22:02:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2022-12-13 22:02:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 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 582 [2022-12-13 22:02:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:02:56,878 INFO L225 Difference]: With dead ends: 650 [2022-12-13 22:02:56,878 INFO L226 Difference]: Without dead ends: 617 [2022-12-13 22:02:56,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1439 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-12-13 22:02:56,882 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 22:02:56,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 22:02:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-12-13 22:02:56,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2022-12-13 22:02:56,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.0503246753246753) internal successors, (647), 616 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 647 transitions. [2022-12-13 22:02:56,896 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 647 transitions. Word has length 582 [2022-12-13 22:02:56,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:02:56,896 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 647 transitions. [2022-12-13 22:02:56,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:02:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 647 transitions. [2022-12-13 22:02:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-12-13 22:02:56,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:02:56,899 INFO L195 NwaCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1] [2022-12-13 22:02:56,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 22:02:57,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 22:02:57,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:02:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:02:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash 122564320, now seen corresponding path program 10 times [2022-12-13 22:02:57,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:02:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702543112] [2022-12-13 22:02:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:02:57,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:02:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:03:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:03:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:03:28,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702543112] [2022-12-13 22:03:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702543112] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:03:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108893805] [2022-12-13 22:03:28,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:03:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:03:28,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:03:28,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:03:28,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:03:28,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:03:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:03:28,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 277 conjunts are in the unsatisfiable core [2022-12-13 22:03:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:03:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:03:28,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:04:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:04:21,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108893805] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:04:21,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:04:21,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2022-12-13 22:04:21,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456702790] [2022-12-13 22:04:21,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:04:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2022-12-13 22:04:21,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:04:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2022-12-13 22:04:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-12-13 22:04:21,595 INFO L87 Difference]: Start difference. First operand 617 states and 647 transitions. Second operand has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:04:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:04:31,956 INFO L93 Difference]: Finished difference Result 1236 states and 1573 transitions. [2022-12-13 22:04:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2022-12-13 22:04:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 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 616 [2022-12-13 22:04:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:04:31,960 INFO L225 Difference]: With dead ends: 1236 [2022-12-13 22:04:31,960 INFO L226 Difference]: Without dead ends: 1171 [2022-12-13 22:04:31,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-12-13 22:04:31,973 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 22:04:31,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 22:04:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-12-13 22:04:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1171. [2022-12-13 22:04:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.0264957264957264) internal successors, (1201), 1170 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:04:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1201 transitions. [2022-12-13 22:04:31,998 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1201 transitions. Word has length 616 [2022-12-13 22:04:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:04:31,999 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1201 transitions. [2022-12-13 22:04:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:04:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1201 transitions. [2022-12-13 22:04:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2022-12-13 22:04:32,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:04:32,006 INFO L195 NwaCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1] [2022-12-13 22:04:32,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 22:04:32,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 22:04:32,207 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:04:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:04:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1917501825, now seen corresponding path program 11 times [2022-12-13 22:04:32,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:04:32,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246389428] [2022-12-13 22:04:32,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:04:32,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:04:33,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:07:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246389428] [2022-12-13 22:07:25,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246389428] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487234977] [2022-12-13 22:07:25,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:07:25,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:25,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:25,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:07:28,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-12-13 22:07:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:07:28,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2425 conjuncts, 554 conjunts are in the unsatisfiable core [2022-12-13 22:07:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:07:28,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:11:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-12-13 22:11:10,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487234977] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:11:10,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:11:10,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [555, 555, 555] total 1109 [2022-12-13 22:11:10,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884740744] [2022-12-13 22:11:10,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:11:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 1109 states [2022-12-13 22:11:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:11:10,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1109 interpolants. [2022-12-13 22:11:10,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614386, Invalid=614386, Unknown=0, NotChecked=0, Total=1228772 [2022-12-13 22:11:10,357 INFO L87 Difference]: Start difference. First operand 1171 states and 1201 transitions. Second operand has 1109 states, 1109 states have (on average 2.0054102795311093) internal successors, (2224), 1109 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:12:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 22:12:16,197 INFO L93 Difference]: Finished difference Result 2344 states and 2958 transitions. [2022-12-13 22:12:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1108 states. [2022-12-13 22:12:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 1109 states, 1109 states have (on average 2.0054102795311093) internal successors, (2224), 1109 states have internal predecessors, (2224), 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 1170 [2022-12-13 22:12:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 22:12:16,203 INFO L225 Difference]: With dead ends: 2344 [2022-12-13 22:12:16,203 INFO L226 Difference]: Without dead ends: 2279 [2022-12-13 22:12:16,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2893 GetRequests, 1786 SyntacticMatches, 0 SemanticMatches, 1107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2208 ImplicationChecksByTransitivity, 297.1s TimeCoverageRelationStatistics Valid=614386, Invalid=614386, Unknown=0, NotChecked=0, Total=1228772 [2022-12-13 22:12:16,269 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 2244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-13 22:12:16,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2244 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-13 22:12:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-12-13 22:12:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2279. [2022-12-13 22:12:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 1.0136084284460052) internal successors, (2309), 2278 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:12:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 2309 transitions. [2022-12-13 22:12:16,329 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 2309 transitions. Word has length 1170 [2022-12-13 22:12:16,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 22:12:16,331 INFO L495 AbstractCegarLoop]: Abstraction has 2279 states and 2309 transitions. [2022-12-13 22:12:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 1109 states, 1109 states have (on average 2.0054102795311093) internal successors, (2224), 1109 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:12:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 2309 transitions. [2022-12-13 22:12:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2279 [2022-12-13 22:12:16,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 22:12:16,369 INFO L195 NwaCegarLoop]: trace histogram [1136, 1106, 30, 1, 1, 1, 1, 1, 1] [2022-12-13 22:12:16,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 22:12:16,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b919dd8c-916d-466a-ba2a-b32659fb1003/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:12:16,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 22:12:16,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:12:16,571 INFO L85 PathProgramCache]: Analyzing trace with hash -722753155, now seen corresponding path program 12 times [2022-12-13 22:12:16,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:12:16,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210565012] [2022-12-13 22:12:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:12:16,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:12:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat