./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:51:15,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:51:15,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:51:16,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:51:16,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:51:16,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:51:16,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:51:16,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:51:16,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:51:16,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:51:16,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:51:16,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:51:16,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:51:16,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:51:16,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:51:16,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:51:16,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:51:16,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:51:16,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:51:16,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:51:16,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:51:16,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:51:16,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:51:16,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:51:16,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:51:16,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:51:16,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:51:16,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:51:16,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:51:16,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:51:16,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:51:16,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:51:16,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:51:16,094 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:51:16,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:51:16,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:51:16,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:51:16,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:51:16,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:51:16,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:51:16,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:51:16,101 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:51:16,133 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:51:16,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:51:16,134 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:51:16,134 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:51:16,135 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:51:16,135 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:51:16,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:51:16,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:51:16,136 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:51:16,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:51:16,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:51:16,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:51:16,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:51:16,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:51:16,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:51:16,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:51:16,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:51:16,139 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:51:16,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:51:16,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:51:16,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:51:16,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:51:16,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:51:16,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:51:16,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:51:16,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:51:16,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:51:16,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:51:16,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:51:16,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:51:16,142 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:51:16,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:51:16,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:51:16,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b13c8359dfc3fa3ad0e51c85ccdf97c793022ae2240daea5433bdb872a277a9 [2022-11-20 10:51:16,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:51:16,434 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:51:16,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:51:16,438 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:51:16,438 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:51:16,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-11-20 10:51:19,496 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:51:19,661 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:51:19,661 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/sv-benchmarks/c/loops-crafted-1/in-de42.c [2022-11-20 10:51:19,668 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/data/6c16470a6/ce480c90dee34f59be47ab584c0f26fb/FLAGdc400af1c [2022-11-20 10:51:19,684 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/data/6c16470a6/ce480c90dee34f59be47ab584c0f26fb [2022-11-20 10:51:19,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:51:19,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:51:19,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:51:19,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:51:19,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:51:19,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32bbf333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19, skipping insertion in model container [2022-11-20 10:51:19,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:51:19,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:51:19,864 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_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2022-11-20 10:51:19,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:51:19,887 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:51:19,900 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_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/sv-benchmarks/c/loops-crafted-1/in-de42.c[368,381] [2022-11-20 10:51:19,904 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:51:19,917 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:51:19,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19 WrapperNode [2022-11-20 10:51:19,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:51:19,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:51:19,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:51:19,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:51:19,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,950 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-20 10:51:19,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:51:19,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:51:19,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:51:19,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:51:19,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,970 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:51:19,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:51:19,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:51:19,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:51:19,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (1/1) ... [2022-11-20 10:51:19,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:51:20,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:20,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:51:20,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:51:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:51:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:51:20,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:51:20,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:51:20,139 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:51:20,141 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:51:20,283 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:51:20,289 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:51:20,289 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 10:51:20,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:20 BoogieIcfgContainer [2022-11-20 10:51:20,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:51:20,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:51:20,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:51:20,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:51:20,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:19" (1/3) ... [2022-11-20 10:51:20,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c4397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:20, skipping insertion in model container [2022-11-20 10:51:20,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:19" (2/3) ... [2022-11-20 10:51:20,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130c4397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:20, skipping insertion in model container [2022-11-20 10:51:20,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:20" (3/3) ... [2022-11-20 10:51:20,301 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de42.c [2022-11-20 10:51:20,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:51:20,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:51:20,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:51:20,402 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;@6ceb5d21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:51:20,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:51:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:51:20,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:20,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:20,414 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2022-11-20 10:51:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111387035] [2022-11-20 10:51:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:20,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:20,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:20,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111387035] [2022-11-20 10:51:20,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111387035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:20,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:20,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:51:20,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627586579] [2022-11-20 10:51:20,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:20,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:51:20,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:51:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:51:20,651 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:20,667 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2022-11-20 10:51:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:51:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-11-20 10:51:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:20,686 INFO L225 Difference]: With dead ends: 27 [2022-11-20 10:51:20,689 INFO L226 Difference]: Without dead ends: 11 [2022-11-20 10:51:20,693 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 [2022-11-20 10:51:20,697 INFO L413 NwaCegarLoop]: 18 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, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:20,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-20 10:51:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-20 10:51:20,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:20,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-11-20 10:51:20,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2022-11-20 10:51:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:20,740 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-11-20 10:51:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-11-20 10:51:20,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:51:20,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:20,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:51:20,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:20,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2022-11-20 10:51:20,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:20,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13117872] [2022-11-20 10:51:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:20,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:21,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:21,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13117872] [2022-11-20 10:51:21,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13117872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:21,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:21,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 10:51:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974282328] [2022-11-20 10:51:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:51:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:51:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:51:21,436 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,580 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-20 10:51:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 10 [2022-11-20 10:51:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,582 INFO L225 Difference]: With dead ends: 29 [2022-11-20 10:51:21,582 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 10:51:21,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:51:21,584 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 10:51:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2022-11-20 10:51:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2022-11-20 10:51:21,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 10 [2022-11-20 10:51:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,592 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2022-11-20 10:51:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2022-11-20 10:51:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:51:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:21,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:51:21,594 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 105287507, now seen corresponding path program 1 times [2022-11-20 10:51:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:21,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321903952] [2022-11-20 10:51:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:21,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:21,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321903952] [2022-11-20 10:51:21,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321903952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:21,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:21,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:21,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461698720] [2022-11-20 10:51:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:51:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:51:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:21,655 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,669 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2022-11-20 10:51:21,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:51:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:51:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,670 INFO L225 Difference]: With dead ends: 30 [2022-11-20 10:51:21,671 INFO L226 Difference]: Without dead ends: 21 [2022-11-20 10:51:21,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:51:21,672 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-20 10:51:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-20 10:51:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2022-11-20 10:51:21,678 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 11 [2022-11-20 10:51:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,679 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2022-11-20 10:51:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2022-11-20 10:51:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:51:21,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:21,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:51:21,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1508115906, now seen corresponding path program 1 times [2022-11-20 10:51:21,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:21,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018692833] [2022-11-20 10:51:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:21,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:21,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018692833] [2022-11-20 10:51:21,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018692833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:21,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:21,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:51:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114971021] [2022-11-20 10:51:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:21,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:21,785 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:51:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:21,823 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2022-11-20 10:51:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:51:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:51:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:21,826 INFO L225 Difference]: With dead ends: 21 [2022-11-20 10:51:21,826 INFO L226 Difference]: Without dead ends: 12 [2022-11-20 10:51:21,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:51:21,827 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:21,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-20 10:51:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-20 10:51:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) 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) [2022-11-20 10:51:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-20 10:51:21,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 11 [2022-11-20 10:51:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:21,831 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-20 10:51:21,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2022-11-20 10:51:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-20 10:51:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:51:21,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:21,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:21,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:51:21,833 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:21,833 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2022-11-20 10:51:21,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:21,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762835615] [2022-11-20 10:51:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:21,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762835615] [2022-11-20 10:51:21,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762835615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926116337] [2022-11-20 10:51:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:21,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:21,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:21,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:21,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:51:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:51:22,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:22,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:22,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926116337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:22,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-20 10:51:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134659975] [2022-11-20 10:51:22,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:51:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:22,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:51:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:51:22,172 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:22,338 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2022-11-20 10:51:22,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:51:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:51:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:22,345 INFO L225 Difference]: With dead ends: 40 [2022-11-20 10:51:22,346 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:51:22,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:51:22,350 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:22,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 42 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:51:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2022-11-20 10:51:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-20 10:51:22,369 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-11-20 10:51:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:22,369 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-20 10:51:22,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-20 10:51:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 10:51:22,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:22,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:22,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:22,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2022-11-20 10:51:22,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:22,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536081137] [2022-11-20 10:51:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:22,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:22,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536081137] [2022-11-20 10:51:22,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536081137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:22,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008941681] [2022-11-20 10:51:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:22,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:22,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:22,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:22,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:51:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:51:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:22,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:51:22,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008941681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:22,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:22,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 10:51:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225778525] [2022-11-20 10:51:22,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:22,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:22,955 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:23,003 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-11-20 10:51:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:51:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-11-20 10:51:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:23,005 INFO L225 Difference]: With dead ends: 39 [2022-11-20 10:51:23,005 INFO L226 Difference]: Without dead ends: 35 [2022-11-20 10:51:23,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:23,010 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:23,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:23,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-20 10:51:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-20 10:51:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-11-20 10:51:23,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2022-11-20 10:51:23,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:23,028 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-11-20 10:51:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-11-20 10:51:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:51:23,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:23,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:23,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:23,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:23,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2022-11-20 10:51:23,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045870715] [2022-11-20 10:51:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:23,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045870715] [2022-11-20 10:51:23,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045870715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:23,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369441550] [2022-11-20 10:51:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:23,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:23,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:23,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:51:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:51:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:24,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369441550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:24,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:24,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-20 10:51:24,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493433980] [2022-11-20 10:51:24,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:24,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:51:24,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:24,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:51:24,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:51:24,608 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:25,225 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-11-20 10:51:25,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:51:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 [2022-11-20 10:51:25,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:25,226 INFO L225 Difference]: With dead ends: 44 [2022-11-20 10:51:25,226 INFO L226 Difference]: Without dead ends: 34 [2022-11-20 10:51:25,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:51:25,228 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:25,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:51:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-20 10:51:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-11-20 10:51:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-20 10:51:25,241 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2022-11-20 10:51:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:25,242 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-20 10:51:25,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-20 10:51:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 10:51:25,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:25,243 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:25,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:25,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:25,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:25,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2022-11-20 10:51:25,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:25,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549871981] [2022-11-20 10:51:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:25,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549871981] [2022-11-20 10:51:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549871981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924880632] [2022-11-20 10:51:25,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:25,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:25,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:25,569 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:25,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:51:25,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:25,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 10:51:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:25,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924880632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:25,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:25,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-11-20 10:51:25,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953925878] [2022-11-20 10:51:25,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:25,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 10:51:25,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:25,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 10:51:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-20 10:51:25,787 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-20 10:51:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:26,687 INFO L93 Difference]: Finished difference Result 107 states and 172 transitions. [2022-11-20 10:51:26,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 10:51:26,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 [2022-11-20 10:51:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:26,689 INFO L225 Difference]: With dead ends: 107 [2022-11-20 10:51:26,689 INFO L226 Difference]: Without dead ends: 99 [2022-11-20 10:51:26,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:51:26,690 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 179 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:26,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 95 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:51:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-20 10:51:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2022-11-20 10:51:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 57 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2022-11-20 10:51:26,723 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 14 [2022-11-20 10:51:26,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:26,723 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2022-11-20 10:51:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-20 10:51:26,724 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2022-11-20 10:51:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:51:26,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:26,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:26,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:26,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:51:26,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:26,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:26,931 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2022-11-20 10:51:26,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:26,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450167219] [2022-11-20 10:51:26,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:26,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:27,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450167219] [2022-11-20 10:51:27,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450167219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:27,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395548200] [2022-11-20 10:51:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:27,013 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:51:27,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:27,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:51:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:27,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:27,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395548200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:27,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:27,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-20 10:51:27,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903581928] [2022-11-20 10:51:27,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:27,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:27,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:27,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:27,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:27,162 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-20 10:51:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:27,208 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-11-20 10:51:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:51:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 15 [2022-11-20 10:51:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:27,210 INFO L225 Difference]: With dead ends: 66 [2022-11-20 10:51:27,210 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 10:51:27,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:27,213 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:27,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 10:51:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-20 10:51:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 53 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) [2022-11-20 10:51:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2022-11-20 10:51:27,253 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 15 [2022-11-20 10:51:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2022-11-20 10:51:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-20 10:51:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2022-11-20 10:51:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:51:27,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:27,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:27,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:27,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 10:51:27,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2022-11-20 10:51:27,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:27,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987999644] [2022-11-20 10:51:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:27,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987999644] [2022-11-20 10:51:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987999644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658712164] [2022-11-20 10:51:27,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:27,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:27,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:27,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:27,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:51:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 10:51:27,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:27,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:51:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:27,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 10:51:27,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658712164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:27,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:27,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-20 10:51:27,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531282716] [2022-11-20 10:51:27,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:27,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:51:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:51:27,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:51:27,752 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:27,972 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2022-11-20 10:51:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:51:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 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 16 [2022-11-20 10:51:27,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:27,974 INFO L225 Difference]: With dead ends: 86 [2022-11-20 10:51:27,974 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 10:51:27,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 10:51:27,975 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:27,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 64 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:27,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 10:51:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2022-11-20 10:51:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.411764705882353) internal successors, (72), 51 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2022-11-20 10:51:27,998 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 16 [2022-11-20 10:51:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:27,998 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 72 transitions. [2022-11-20 10:51:27,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 72 transitions. [2022-11-20 10:51:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:51:27,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:27,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:28,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:28,205 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 2 times [2022-11-20 10:51:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:28,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572658086] [2022-11-20 10:51:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:51:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572658086] [2022-11-20 10:51:28,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572658086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110707734] [2022-11-20 10:51:28,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:51:28,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:28,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:28,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:51:28,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:51:28,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:28,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:51:28,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:51:28,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 10:51:28,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110707734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:28,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:28,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-11-20 10:51:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640326342] [2022-11-20 10:51:28,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:51:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:28,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:51:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:51:28,460 INFO L87 Difference]: Start difference. First operand 52 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-11-20 10:51:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:28,539 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2022-11-20 10:51:28,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:51:28,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 16 [2022-11-20 10:51:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:28,540 INFO L225 Difference]: With dead ends: 71 [2022-11-20 10:51:28,540 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 10:51:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:51:28,541 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:51:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 10:51:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-11-20 10:51:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.40625) internal successors, (90), 64 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2022-11-20 10:51:28,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 16 [2022-11-20 10:51:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:28,571 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2022-11-20 10:51:28,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-11-20 10:51:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2022-11-20 10:51:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:51:28,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:28,572 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:28,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:28,778 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2022-11-20 10:51:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:28,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687901278] [2022-11-20 10:51:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:29,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687901278] [2022-11-20 10:51:29,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687901278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:29,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240734519] [2022-11-20 10:51:29,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:29,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:29,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:29,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:51:29,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:51:29,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:29,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 10:51:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:30,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:31,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:31,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240734519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:31,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:31,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 14] total 35 [2022-11-20 10:51:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779756419] [2022-11-20 10:51:31,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 10:51:31,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 10:51:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 10:51:31,125 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:32,771 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-11-20 10:51:32,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:51:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 10:51:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:32,776 INFO L225 Difference]: With dead ends: 82 [2022-11-20 10:51:32,776 INFO L226 Difference]: Without dead ends: 60 [2022-11-20 10:51:32,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=292, Invalid=1600, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 10:51:32,777 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:32,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 122 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:51:32,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-20 10:51:32,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-11-20 10:51:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2022-11-20 10:51:32,800 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 18 [2022-11-20 10:51:32,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:32,800 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2022-11-20 10:51:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2022-11-20 10:51:32,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 10:51:32,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:32,801 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:32,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 10:51:33,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:33,008 INFO L85 PathProgramCache]: Analyzing trace with hash 469660332, now seen corresponding path program 5 times [2022-11-20 10:51:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:33,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394099923] [2022-11-20 10:51:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394099923] [2022-11-20 10:51:33,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394099923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352559200] [2022-11-20 10:51:33,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:51:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:33,179 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:33,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:51:33,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:51:33,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:33,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 10:51:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:33,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:51:33,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352559200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:33,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:33,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-11-20 10:51:33,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643452902] [2022-11-20 10:51:33,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:33,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 10:51:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 10:51:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:51:33,454 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:36,885 INFO L93 Difference]: Finished difference Result 165 states and 244 transitions. [2022-11-20 10:51:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 10:51:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 10:51:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:36,887 INFO L225 Difference]: With dead ends: 165 [2022-11-20 10:51:36,887 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 10:51:36,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1018, Invalid=2764, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 10:51:36,889 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 265 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:36,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 120 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:51:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 10:51:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 78. [2022-11-20 10:51:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.3896103896103895) internal successors, (107), 77 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2022-11-20 10:51:36,919 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 18 [2022-11-20 10:51:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:36,920 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2022-11-20 10:51:36,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2022-11-20 10:51:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 10:51:36,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:36,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:36,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:37,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 3 times [2022-11-20 10:51:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477303158] [2022-11-20 10:51:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:37,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:51:37,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477303158] [2022-11-20 10:51:37,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477303158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:37,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948336443] [2022-11-20 10:51:37,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:37,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:37,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:37,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:37,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:51:37,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:51:37,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 10:51:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:51:37,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:51:37,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948336443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:37,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:37,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-11-20 10:51:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242322867] [2022-11-20 10:51:37,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:37,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:51:37,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:37,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:51:37,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:51:37,493 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:37,611 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-11-20 10:51:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:51:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 19 [2022-11-20 10:51:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:37,612 INFO L225 Difference]: With dead ends: 102 [2022-11-20 10:51:37,612 INFO L226 Difference]: Without dead ends: 98 [2022-11-20 10:51:37,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:51:37,613 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:37,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 70 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-20 10:51:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-11-20 10:51:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.4021739130434783) internal successors, (129), 92 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 129 transitions. [2022-11-20 10:51:37,663 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 129 transitions. Word has length 19 [2022-11-20 10:51:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:37,663 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 129 transitions. [2022-11-20 10:51:37,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 129 transitions. [2022-11-20 10:51:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:51:37,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:37,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:37,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:37,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:51:37,870 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2022-11-20 10:51:37,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:37,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587279597] [2022-11-20 10:51:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:37,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:38,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587279597] [2022-11-20 10:51:38,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587279597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:38,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950957414] [2022-11-20 10:51:38,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:51:38,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:38,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:38,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:38,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:51:38,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 10:51:38,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:38,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 10:51:38,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:38,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 10:51:38,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950957414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:38,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-11-20 10:51:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679229007] [2022-11-20 10:51:38,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 10:51:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 10:51:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-11-20 10:51:38,298 INFO L87 Difference]: Start difference. First operand 93 states and 129 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:38,704 INFO L93 Difference]: Finished difference Result 142 states and 186 transitions. [2022-11-20 10:51:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:51:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:51:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:38,705 INFO L225 Difference]: With dead ends: 142 [2022-11-20 10:51:38,705 INFO L226 Difference]: Without dead ends: 126 [2022-11-20 10:51:38,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:51:38,706 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:38,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 75 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:51:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-20 10:51:38,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 90. [2022-11-20 10:51:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.3820224719101124) internal successors, (123), 89 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 123 transitions. [2022-11-20 10:51:38,745 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 123 transitions. Word has length 20 [2022-11-20 10:51:38,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:38,746 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 123 transitions. [2022-11-20 10:51:38,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:38,747 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 123 transitions. [2022-11-20 10:51:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 10:51:38,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:38,747 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:38,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:51:38,952 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 401524257, now seen corresponding path program 3 times [2022-11-20 10:51:38,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:38,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549032359] [2022-11-20 10:51:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:39,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549032359] [2022-11-20 10:51:39,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549032359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:39,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560837164] [2022-11-20 10:51:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:51:39,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:39,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:39,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:51:39,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 10:51:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:51:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 10:51:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:39,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560837164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:39,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:39,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-11-20 10:51:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594730200] [2022-11-20 10:51:39,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:51:39,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:51:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:51:39,772 INFO L87 Difference]: Start difference. First operand 90 states and 123 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-11-20 10:51:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:55,429 INFO L93 Difference]: Finished difference Result 396 states and 605 transitions. [2022-11-20 10:51:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 10:51:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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 21 [2022-11-20 10:51:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:55,432 INFO L225 Difference]: With dead ends: 396 [2022-11-20 10:51:55,433 INFO L226 Difference]: Without dead ends: 364 [2022-11-20 10:51:55,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2022-11-20 10:51:55,435 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 731 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:55,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [731 Valid, 396 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 10:51:55,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-20 10:51:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 140. [2022-11-20 10:51:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.381294964028777) internal successors, (192), 139 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 192 transitions. [2022-11-20 10:51:55,539 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 192 transitions. Word has length 21 [2022-11-20 10:51:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:55,540 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 192 transitions. [2022-11-20 10:51:55,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 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) [2022-11-20 10:51:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 192 transitions. [2022-11-20 10:51:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 10:51:55,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:55,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:55,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:51:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:51:55,747 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:55,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 7 times [2022-11-20 10:51:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:55,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415484987] [2022-11-20 10:51:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:56,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415484987] [2022-11-20 10:51:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415484987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:56,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186687497] [2022-11-20 10:51:56,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:51:56,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:56,264 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:56,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:51:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:56,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 10:51:56,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:51:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:57,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:51:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:57,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186687497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:51:57,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:51:57,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15] total 36 [2022-11-20 10:51:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230182056] [2022-11-20 10:51:57,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:51:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:51:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:51:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:51:57,908 INFO L87 Difference]: Start difference. First operand 140 states and 192 transitions. Second operand has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:59,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:51:59,450 INFO L93 Difference]: Finished difference Result 161 states and 215 transitions. [2022-11-20 10:51:59,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:51:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 10:51:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:51:59,451 INFO L225 Difference]: With dead ends: 161 [2022-11-20 10:51:59,451 INFO L226 Difference]: Without dead ends: 147 [2022-11-20 10:51:59,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 10:51:59,452 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:51:59,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 104 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 10:51:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-20 10:51:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-11-20 10:51:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3617021276595744) internal successors, (192), 141 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 192 transitions. [2022-11-20 10:51:59,525 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 192 transitions. Word has length 22 [2022-11-20 10:51:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:51:59,526 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 192 transitions. [2022-11-20 10:51:59,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 192 transitions. [2022-11-20 10:51:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 10:51:59,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:59,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:59,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 10:51:59,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 10:51:59,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 4 times [2022-11-20 10:51:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:59,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747010581] [2022-11-20 10:51:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:59,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:51:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747010581] [2022-11-20 10:51:59,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747010581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:51:59,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20071404] [2022-11-20 10:51:59,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:51:59,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:51:59,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:51:59,991 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:51:59,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:52:00,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:52:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 10:52:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:52:00,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:52:00,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20071404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:00,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:00,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2022-11-20 10:52:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996797023] [2022-11-20 10:52:00,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:00,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 10:52:00,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:00,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 10:52:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:52:00,208 INFO L87 Difference]: Start difference. First operand 142 states and 192 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:00,435 INFO L93 Difference]: Finished difference Result 181 states and 249 transitions. [2022-11-20 10:52:00,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:52:00,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 10:52:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:00,436 INFO L225 Difference]: With dead ends: 181 [2022-11-20 10:52:00,437 INFO L226 Difference]: Without dead ends: 177 [2022-11-20 10:52:00,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:52:00,438 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:00,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 127 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:52:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-20 10:52:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 162. [2022-11-20 10:52:00,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.3850931677018634) internal successors, (223), 161 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 223 transitions. [2022-11-20 10:52:00,500 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 223 transitions. Word has length 22 [2022-11-20 10:52:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:00,500 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 223 transitions. [2022-11-20 10:52:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 223 transitions. [2022-11-20 10:52:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:52:00,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:00,501 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:00,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:00,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:52:00,702 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:00,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1482516206, now seen corresponding path program 8 times [2022-11-20 10:52:00,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:00,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839224771] [2022-11-20 10:52:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:00,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:52:00,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839224771] [2022-11-20 10:52:00,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839224771] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848654929] [2022-11-20 10:52:00,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:52:00,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:00,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:00,819 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:52:00,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:52:00,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 10:52:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:52:00,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:52:00,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848654929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:00,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:00,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-20 10:52:00,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996885839] [2022-11-20 10:52:00,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:00,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:52:00,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:00,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:52:00,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:00,964 INFO L87 Difference]: Start difference. First operand 162 states and 223 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:01,141 INFO L93 Difference]: Finished difference Result 179 states and 241 transitions. [2022-11-20 10:52:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:52:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 23 [2022-11-20 10:52:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:01,143 INFO L225 Difference]: With dead ends: 179 [2022-11-20 10:52:01,143 INFO L226 Difference]: Without dead ends: 161 [2022-11-20 10:52:01,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:52:01,145 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:01,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:52:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-20 10:52:01,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-20 10:52:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.3860759493670887) internal successors, (219), 158 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 219 transitions. [2022-11-20 10:52:01,246 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 219 transitions. Word has length 23 [2022-11-20 10:52:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:01,247 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 219 transitions. [2022-11-20 10:52:01,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 219 transitions. [2022-11-20 10:52:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:52:01,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:01,248 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:01,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:01,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:01,448 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:01,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 5 times [2022-11-20 10:52:01,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:01,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049114404] [2022-11-20 10:52:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:01,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:52:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049114404] [2022-11-20 10:52:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049114404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899340932] [2022-11-20 10:52:01,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:52:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:01,659 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:01,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:52:01,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:52:01,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:52:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:52:01,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:52:02,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899340932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:02,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:02,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-11-20 10:52:02,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179611353] [2022-11-20 10:52:02,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:02,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 10:52:02,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 10:52:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-11-20 10:52:02,276 INFO L87 Difference]: Start difference. First operand 159 states and 219 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-11-20 10:52:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:03,364 INFO L93 Difference]: Finished difference Result 289 states and 365 transitions. [2022-11-20 10:52:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 10:52:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) Word has length 23 [2022-11-20 10:52:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:03,366 INFO L225 Difference]: With dead ends: 289 [2022-11-20 10:52:03,366 INFO L226 Difference]: Without dead ends: 269 [2022-11-20 10:52:03,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:52:03,367 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 149 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:03,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 121 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:52:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-20 10:52:03,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2022-11-20 10:52:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.4069767441860466) internal successors, (242), 172 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 242 transitions. [2022-11-20 10:52:03,462 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 242 transitions. Word has length 23 [2022-11-20 10:52:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:03,462 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 242 transitions. [2022-11-20 10:52:03,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-11-20 10:52:03,463 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 242 transitions. [2022-11-20 10:52:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:52:03,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:03,464 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:03,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:03,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:03,669 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash 418509715, now seen corresponding path program 1 times [2022-11-20 10:52:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:03,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360781645] [2022-11-20 10:52:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:03,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360781645] [2022-11-20 10:52:03,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360781645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381452614] [2022-11-20 10:52:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:03,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:03,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:03,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 10:52:04,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:52:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:52:04,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-20 10:52:04,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381452614] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:04,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:52:04,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16, 16] total 19 [2022-11-20 10:52:04,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174325070] [2022-11-20 10:52:04,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:52:04,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:52:04,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:04,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:52:04,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:52:04,151 INFO L87 Difference]: Start difference. First operand 173 states and 242 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:04,299 INFO L93 Difference]: Finished difference Result 178 states and 246 transitions. [2022-11-20 10:52:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:52:04,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 23 [2022-11-20 10:52:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:04,301 INFO L225 Difference]: With dead ends: 178 [2022-11-20 10:52:04,301 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 10:52:04,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-11-20 10:52:04,302 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:04,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:52:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 10:52:04,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-20 10:52:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.3855421686746987) internal successors, (230), 166 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 230 transitions. [2022-11-20 10:52:04,392 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 230 transitions. Word has length 23 [2022-11-20 10:52:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:04,392 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 230 transitions. [2022-11-20 10:52:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 230 transitions. [2022-11-20 10:52:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:52:04,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:04,393 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:04,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:04,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 10:52:04,595 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:04,595 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 6 times [2022-11-20 10:52:04,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:04,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279331396] [2022-11-20 10:52:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:04,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:04,868 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:52:04,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279331396] [2022-11-20 10:52:04,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279331396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:04,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667315073] [2022-11-20 10:52:04,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:52:04,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:04,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:04,870 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:04,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 10:52:04,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:52:04,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:04,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 10:52:04,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:52:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:52:05,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667315073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:05,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:05,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2022-11-20 10:52:05,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074672355] [2022-11-20 10:52:05,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:05,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:52:05,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:05,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:52:05,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:52:05,147 INFO L87 Difference]: Start difference. First operand 167 states and 230 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:52:05,512 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2022-11-20 10:52:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:52:05,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 10:52:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:52:05,514 INFO L225 Difference]: With dead ends: 209 [2022-11-20 10:52:05,514 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 10:52:05,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:52:05,517 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:52:05,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 166 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:52:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 10:52:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 196. [2022-11-20 10:52:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.4) internal successors, (273), 195 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 273 transitions. [2022-11-20 10:52:05,617 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 273 transitions. Word has length 25 [2022-11-20 10:52:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:52:05,618 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 273 transitions. [2022-11-20 10:52:05,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:52:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 273 transitions. [2022-11-20 10:52:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:52:05,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:52:05,619 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:52:05,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 10:52:05,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 10:52:05,823 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:52:05,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:52:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash -584607823, now seen corresponding path program 9 times [2022-11-20 10:52:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:52:05,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84453026] [2022-11-20 10:52:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:52:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:52:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:52:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:52:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:52:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84453026] [2022-11-20 10:52:06,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84453026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:52:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455816617] [2022-11-20 10:52:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:52:06,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:52:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:52:06,138 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:52:06,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 10:52:06,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 10:52:06,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:52:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 10:52:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:52:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:52:06,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:52:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:52:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455816617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:52:06,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:52:06,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-20 10:52:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890179500] [2022-11-20 10:52:06,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:52:06,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 10:52:06,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:52:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 10:52:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 10:52:06,973 INFO L87 Difference]: Start difference. First operand 196 states and 273 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:59,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:59,409 INFO L93 Difference]: Finished difference Result 644 states and 976 transitions. [2022-11-20 10:53:59,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-20 10:53:59,410 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 25 [2022-11-20 10:53:59,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:59,412 INFO L225 Difference]: With dead ends: 644 [2022-11-20 10:53:59,412 INFO L226 Difference]: Without dead ends: 615 [2022-11-20 10:53:59,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6897 ImplicationChecksByTransitivity, 108.4s TimeCoverageRelationStatistics Valid=5024, Invalid=13336, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 10:53:59,417 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1131 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:59,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 432 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-20 10:53:59,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-11-20 10:53:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 225. [2022-11-20 10:53:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4107142857142858) internal successors, (316), 224 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 316 transitions. [2022-11-20 10:53:59,563 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 316 transitions. Word has length 25 [2022-11-20 10:53:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:59,564 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 316 transitions. [2022-11-20 10:53:59,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 316 transitions. [2022-11-20 10:53:59,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:53:59,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:59,565 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:59,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-20 10:53:59,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 10:53:59,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 10 times [2022-11-20 10:53:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:59,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256082534] [2022-11-20 10:53:59,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:00,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:00,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256082534] [2022-11-20 10:54:00,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256082534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:00,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321825050] [2022-11-20 10:54:00,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:54:00,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:00,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:00,423 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:00,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 10:54:00,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:54:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:00,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-20 10:54:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:01,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:04,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321825050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:04,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:04,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 22] total 57 [2022-11-20 10:54:04,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400594677] [2022-11-20 10:54:04,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:04,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-20 10:54:04,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-20 10:54:04,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2820, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 10:54:04,121 INFO L87 Difference]: Start difference. First operand 225 states and 316 transitions. Second operand has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:09,193 INFO L93 Difference]: Finished difference Result 248 states and 340 transitions. [2022-11-20 10:54:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 10:54:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 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 26 [2022-11-20 10:54:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:09,194 INFO L225 Difference]: With dead ends: 248 [2022-11-20 10:54:09,194 INFO L226 Difference]: Without dead ends: 225 [2022-11-20 10:54:09,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=773, Invalid=4629, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 10:54:09,196 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 162 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:09,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 197 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 10:54:09,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-20 10:54:09,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 219. [2022-11-20 10:54:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.4174311926605505) internal successors, (309), 218 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 309 transitions. [2022-11-20 10:54:09,377 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 309 transitions. Word has length 26 [2022-11-20 10:54:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:09,377 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 309 transitions. [2022-11-20 10:54:09,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 57 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 309 transitions. [2022-11-20 10:54:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:54:09,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:09,378 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:09,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-20 10:54:09,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 10:54:09,584 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash -745924722, now seen corresponding path program 7 times [2022-11-20 10:54:09,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:09,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231453654] [2022-11-20 10:54:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:09,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:54:09,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231453654] [2022-11-20 10:54:09,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231453654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:09,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958672291] [2022-11-20 10:54:09,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:54:09,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:09,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:09,895 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:09,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 10:54:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:54:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:54:10,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:10,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 10:54:10,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958672291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:10,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:10,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-11-20 10:54:10,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547739483] [2022-11-20 10:54:10,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:10,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 10:54:10,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:10,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 10:54:10,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-11-20 10:54:10,498 INFO L87 Difference]: Start difference. First operand 219 states and 309 transitions. Second operand has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:12,490 INFO L93 Difference]: Finished difference Result 406 states and 504 transitions. [2022-11-20 10:54:12,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 10:54:12,491 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 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 26 [2022-11-20 10:54:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:12,492 INFO L225 Difference]: With dead ends: 406 [2022-11-20 10:54:12,493 INFO L226 Difference]: Without dead ends: 380 [2022-11-20 10:54:12,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=551, Invalid=2101, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:54:12,494 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 252 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:12,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 152 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:54:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-20 10:54:12,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 226. [2022-11-20 10:54:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4133333333333333) internal successors, (318), 225 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 318 transitions. [2022-11-20 10:54:12,649 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 318 transitions. Word has length 26 [2022-11-20 10:54:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:12,650 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 318 transitions. [2022-11-20 10:54:12,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,650 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 318 transitions. [2022-11-20 10:54:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:54:12,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:12,651 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:12,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-20 10:54:12,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 10:54:12,856 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1973427396, now seen corresponding path program 11 times [2022-11-20 10:54:12,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556742923] [2022-11-20 10:54:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:12,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 10:54:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556742923] [2022-11-20 10:54:13,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556742923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838586963] [2022-11-20 10:54:13,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:54:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:13,079 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:13,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 10:54:13,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:54:13,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:13,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:54:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 10:54:13,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:54:13,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838586963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:13,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:13,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 10] total 25 [2022-11-20 10:54:13,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652295037] [2022-11-20 10:54:13,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:13,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:54:13,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:13,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:54:13,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:54:13,656 INFO L87 Difference]: Start difference. First operand 226 states and 318 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:15,171 INFO L93 Difference]: Finished difference Result 339 states and 433 transitions. [2022-11-20 10:54:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:54:15,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:54:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:15,174 INFO L225 Difference]: With dead ends: 339 [2022-11-20 10:54:15,174 INFO L226 Difference]: Without dead ends: 273 [2022-11-20 10:54:15,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:54:15,177 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:15,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 160 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:54:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-20 10:54:15,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 210. [2022-11-20 10:54:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.3827751196172249) internal successors, (289), 209 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 289 transitions. [2022-11-20 10:54:15,320 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 289 transitions. Word has length 28 [2022-11-20 10:54:15,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:15,320 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 289 transitions. [2022-11-20 10:54:15,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,320 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 289 transitions. [2022-11-20 10:54:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:54:15,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:15,321 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:15,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:15,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 10:54:15,521 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1548332572, now seen corresponding path program 8 times [2022-11-20 10:54:15,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915304306] [2022-11-20 10:54:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:54:15,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915304306] [2022-11-20 10:54:15,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915304306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:15,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793384248] [2022-11-20 10:54:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:54:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:15,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:15,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 10:54:15,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:54:15,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 10:54:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:54:16,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 10:54:16,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793384248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:16,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:16,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 20 [2022-11-20 10:54:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787566781] [2022-11-20 10:54:16,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:16,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:54:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:54:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:54:16,151 INFO L87 Difference]: Start difference. First operand 210 states and 289 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2022-11-20 10:54:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:16,649 INFO L93 Difference]: Finished difference Result 258 states and 363 transitions. [2022-11-20 10:54:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:54:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 28 [2022-11-20 10:54:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:16,651 INFO L225 Difference]: With dead ends: 258 [2022-11-20 10:54:16,651 INFO L226 Difference]: Without dead ends: 254 [2022-11-20 10:54:16,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:54:16,652 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 49 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:16,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:54:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-20 10:54:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 243. [2022-11-20 10:54:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.3925619834710743) internal successors, (337), 242 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 337 transitions. [2022-11-20 10:54:16,874 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 337 transitions. Word has length 28 [2022-11-20 10:54:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:16,874 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 337 transitions. [2022-11-20 10:54:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) [2022-11-20 10:54:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 337 transitions. [2022-11-20 10:54:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 10:54:16,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:16,875 INFO L195 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:54:16,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:17,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:17,081 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash -435047903, now seen corresponding path program 12 times [2022-11-20 10:54:17,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:17,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355173288] [2022-11-20 10:54:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:17,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:54:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:17,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355173288] [2022-11-20 10:54:17,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355173288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:54:17,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570144652] [2022-11-20 10:54:17,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:54:17,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:17,454 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:17,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 10:54:17,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 10:54:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:54:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 10:54:17,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:54:17,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:54:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:54:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570144652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:54:18,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:54:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-11-20 10:54:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637976634] [2022-11-20 10:54:18,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:54:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:54:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:54:18,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:54:18,482 INFO L87 Difference]: Start difference. First operand 243 states and 337 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:31,744 WARN L233 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:05,596 WARN L233 SmtUtils]: Spent 16.74s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:29,493 WARN L233 SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:55:44,240 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:04,753 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:12,570 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:31,476 WARN L233 SmtUtils]: Spent 6.38s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:42,822 WARN L233 SmtUtils]: Spent 7.79s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:56:58,655 WARN L233 SmtUtils]: Spent 8.50s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:57:32,811 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 10:59:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:14,082 INFO L93 Difference]: Finished difference Result 799 states and 1122 transitions. [2022-11-20 10:59:14,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-11-20 10:59:14,084 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 10:59:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:14,087 INFO L225 Difference]: With dead ends: 799 [2022-11-20 10:59:14,087 INFO L226 Difference]: Without dead ends: 746 [2022-11-20 10:59:14,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14689 ImplicationChecksByTransitivity, 287.7s TimeCoverageRelationStatistics Valid=8862, Invalid=28190, Unknown=4, NotChecked=0, Total=37056 [2022-11-20 10:59:14,092 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1437 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:14,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 436 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-20 10:59:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-11-20 10:59:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 276. [2022-11-20 10:59:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.4036363636363636) internal successors, (386), 275 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 386 transitions. [2022-11-20 10:59:14,315 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 386 transitions. Word has length 29 [2022-11-20 10:59:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:14,326 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 386 transitions. [2022-11-20 10:59:14,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 386 transitions. [2022-11-20 10:59:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:59:14,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:14,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:14,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:14,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 10:59:14,527 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:14,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:14,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1507034516, now seen corresponding path program 13 times [2022-11-20 10:59:14,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:14,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989901425] [2022-11-20 10:59:14,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:14,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989901425] [2022-11-20 10:59:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989901425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768563980] [2022-11-20 10:59:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:59:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:15,395 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:15,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 10:59:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:16,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-20 10:59:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:17,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768563980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:20,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:20,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 26] total 68 [2022-11-20 10:59:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558443142] [2022-11-20 10:59:20,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 10:59:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 10:59:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=4046, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 10:59:20,409 INFO L87 Difference]: Start difference. First operand 276 states and 386 transitions. Second operand has 68 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:29,823 INFO L93 Difference]: Finished difference Result 307 states and 420 transitions. [2022-11-20 10:59:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 10:59:29,823 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 10:59:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:29,823 INFO L225 Difference]: With dead ends: 307 [2022-11-20 10:59:29,823 INFO L226 Difference]: Without dead ends: 281 [2022-11-20 10:59:29,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1192, Invalid=7180, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 10:59:29,825 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:29,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 223 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 10:59:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-20 10:59:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 274. [2022-11-20 10:59:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.4065934065934067) internal successors, (384), 273 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 384 transitions. [2022-11-20 10:59:30,039 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 384 transitions. Word has length 30 [2022-11-20 10:59:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:30,039 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 384 transitions. [2022-11-20 10:59:30,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 68 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 384 transitions. [2022-11-20 10:59:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:59:30,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:30,040 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:30,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:30,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 10:59:30,241 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -366435620, now seen corresponding path program 9 times [2022-11-20 10:59:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:30,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194719913] [2022-11-20 10:59:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:30,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:59:30,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194719913] [2022-11-20 10:59:30,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194719913] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:30,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381294722] [2022-11-20 10:59:30,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:30,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:30,556 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:30,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 10:59:30,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 10:59:30,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 10:59:30,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:59:31,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 10:59:31,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381294722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:31,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:31,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-20 10:59:31,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579568277] [2022-11-20 10:59:31,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:31,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 10:59:31,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 10:59:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 10:59:31,637 INFO L87 Difference]: Start difference. First operand 274 states and 384 transitions. Second operand has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 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) [2022-11-20 10:59:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:34,961 INFO L93 Difference]: Finished difference Result 465 states and 580 transitions. [2022-11-20 10:59:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 10:59:34,961 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 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 30 [2022-11-20 10:59:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:34,963 INFO L225 Difference]: With dead ends: 465 [2022-11-20 10:59:34,963 INFO L226 Difference]: Without dead ends: 441 [2022-11-20 10:59:34,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=830, Invalid=3202, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 10:59:34,965 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 303 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:34,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 146 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:59:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-20 10:59:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 276. [2022-11-20 10:59:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.4) internal successors, (385), 275 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 385 transitions. [2022-11-20 10:59:35,208 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 385 transitions. Word has length 30 [2022-11-20 10:59:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:35,208 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 385 transitions. [2022-11-20 10:59:35,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 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) [2022-11-20 10:59:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 385 transitions. [2022-11-20 10:59:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:59:35,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:35,209 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:35,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:35,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:35,415 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:35,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1503122194, now seen corresponding path program 10 times [2022-11-20 10:59:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069805020] [2022-11-20 10:59:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:59:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:35,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069805020] [2022-11-20 10:59:35,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069805020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:35,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924033100] [2022-11-20 10:59:35,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:59:35,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:35,821 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:35,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 10:59:35,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:59:35,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 10:59:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:59:36,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 10:59:36,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924033100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:36,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:36,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 23 [2022-11-20 10:59:36,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220731885] [2022-11-20 10:59:36,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:36,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:59:36,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:59:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:59:36,141 INFO L87 Difference]: Start difference. First operand 276 states and 385 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:36,773 INFO L93 Difference]: Finished difference Result 334 states and 475 transitions. [2022-11-20 10:59:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:59:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 10:59:36,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:36,775 INFO L225 Difference]: With dead ends: 334 [2022-11-20 10:59:36,775 INFO L226 Difference]: Without dead ends: 330 [2022-11-20 10:59:36,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:59:36,776 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:36,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 259 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:59:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-20 10:59:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 316. [2022-11-20 10:59:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.4095238095238096) internal successors, (444), 315 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:37,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 444 transitions. [2022-11-20 10:59:37,052 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 444 transitions. Word has length 31 [2022-11-20 10:59:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:37,052 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 444 transitions. [2022-11-20 10:59:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 444 transitions. [2022-11-20 10:59:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:59:37,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:37,053 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:37,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:37,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-20 10:59:37,254 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash -397070706, now seen corresponding path program 14 times [2022-11-20 10:59:37,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:37,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840856424] [2022-11-20 10:59:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:59:37,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840856424] [2022-11-20 10:59:37,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840856424] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103118269] [2022-11-20 10:59:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:59:37,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:37,539 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 10:59:37,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:59:37,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 10:59:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-20 10:59:37,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 10:59:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103118269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:38,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:38,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 12] total 30 [2022-11-20 10:59:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988147079] [2022-11-20 10:59:38,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 10:59:38,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 10:59:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-11-20 10:59:38,151 INFO L87 Difference]: Start difference. First operand 316 states and 444 transitions. Second operand has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:40,770 INFO L93 Difference]: Finished difference Result 461 states and 592 transitions. [2022-11-20 10:59:40,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 10:59:40,771 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:59:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:40,773 INFO L225 Difference]: With dead ends: 461 [2022-11-20 10:59:40,773 INFO L226 Difference]: Without dead ends: 390 [2022-11-20 10:59:40,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=343, Invalid=2309, Unknown=0, NotChecked=0, Total=2652 [2022-11-20 10:59:40,774 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:40,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 211 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 10:59:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-20 10:59:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 297. [2022-11-20 10:59:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.3817567567567568) internal successors, (409), 296 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 409 transitions. [2022-11-20 10:59:41,152 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 409 transitions. Word has length 32 [2022-11-20 10:59:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:41,153 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 409 transitions. [2022-11-20 10:59:41,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 30 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 409 transitions. [2022-11-20 10:59:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 10:59:41,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:41,154 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:41,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 10:59:41,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:41,360 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:59:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:41,360 INFO L85 PathProgramCache]: Analyzing trace with hash 266686257, now seen corresponding path program 15 times [2022-11-20 10:59:41,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:41,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57461906] [2022-11-20 10:59:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:59:41,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:41,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57461906] [2022-11-20 10:59:41,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57461906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:41,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055263454] [2022-11-20 10:59:41,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:59:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:41,815 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:41,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 10:59:42,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 10:59:42,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:59:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 10:59:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:59:42,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 10:59:43,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055263454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:43,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:43,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 36 [2022-11-20 10:59:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408972707] [2022-11-20 10:59:43,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:43,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:59:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:59:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 10:59:43,114 INFO L87 Difference]: Start difference. First operand 297 states and 409 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:56,259 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:07,785 WARN L233 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:39,515 WARN L233 SmtUtils]: Spent 7.56s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:00:52,530 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:01:29,596 WARN L233 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:01:58,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:58,422 INFO L93 Difference]: Finished difference Result 914 states and 1238 transitions. [2022-11-20 11:01:58,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 11:01:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 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 33 [2022-11-20 11:01:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:58,427 INFO L225 Difference]: With dead ends: 914 [2022-11-20 11:01:58,427 INFO L226 Difference]: Without dead ends: 826 [2022-11-20 11:01:58,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 132.7s TimeCoverageRelationStatistics Valid=3295, Invalid=7416, Unknown=1, NotChecked=0, Total=10712 [2022-11-20 11:01:58,428 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 852 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:58,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 454 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 11:01:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2022-11-20 11:01:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 340. [2022-11-20 11:01:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.40117994100295) internal successors, (475), 339 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 475 transitions. [2022-11-20 11:01:58,721 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 475 transitions. Word has length 33 [2022-11-20 11:01:58,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:58,721 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 475 transitions. [2022-11-20 11:01:58,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 36 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:01:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 475 transitions. [2022-11-20 11:01:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:01:58,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:58,723 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:58,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:58,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 11:01:58,929 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:01:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:58,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1134925732, now seen corresponding path program 16 times [2022-11-20 11:01:58,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:58,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033154043] [2022-11-20 11:01:58,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:58,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033154043] [2022-11-20 11:01:59,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033154043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241734663] [2022-11-20 11:01:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:01:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:59,924 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 11:02:00,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:02:00,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:00,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 11:02:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:01,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:02:05,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241734663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:05,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:05,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 30] total 79 [2022-11-20 11:02:05,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857648199] [2022-11-20 11:02:05,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:05,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-20 11:02:05,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-20 11:02:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=5492, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 11:02:05,574 INFO L87 Difference]: Start difference. First operand 340 states and 475 transitions. Second operand has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:27,583 INFO L93 Difference]: Finished difference Result 375 states and 513 transitions. [2022-11-20 11:02:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:02:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:02:27,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:27,584 INFO L225 Difference]: With dead ends: 375 [2022-11-20 11:02:27,584 INFO L226 Difference]: Without dead ends: 346 [2022-11-20 11:02:27,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1741, Invalid=10469, Unknown=0, NotChecked=0, Total=12210 [2022-11-20 11:02:27,585 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 264 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:27,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 259 Invalid, 1907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-20 11:02:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-20 11:02:28,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 338. [2022-11-20 11:02:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.403560830860534) internal successors, (473), 337 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 473 transitions. [2022-11-20 11:02:28,087 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 473 transitions. Word has length 34 [2022-11-20 11:02:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:28,087 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 473 transitions. [2022-11-20 11:02:28,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.2025316455696202) internal successors, (95), 79 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:28,087 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 473 transitions. [2022-11-20 11:02:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:02:28,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:28,088 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:28,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:28,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:28,294 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:02:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:28,295 INFO L85 PathProgramCache]: Analyzing trace with hash -109697138, now seen corresponding path program 11 times [2022-11-20 11:02:28,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:28,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428876780] [2022-11-20 11:02:28,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:28,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:02:28,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428876780] [2022-11-20 11:02:28,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428876780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749170434] [2022-11-20 11:02:28,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:02:28,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:28,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:28,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:28,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 11:02:30,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-20 11:02:30,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 11:02:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:02:30,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 11:02:31,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749170434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:31,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:31,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2022-11-20 11:02:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049735006] [2022-11-20 11:02:31,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 11:02:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 11:02:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 11:02:31,160 INFO L87 Difference]: Start difference. First operand 338 states and 473 transitions. Second operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:37,864 INFO L93 Difference]: Finished difference Result 589 states and 734 transitions. [2022-11-20 11:02:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:02:37,864 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 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 34 [2022-11-20 11:02:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:37,867 INFO L225 Difference]: With dead ends: 589 [2022-11-20 11:02:37,867 INFO L226 Difference]: Without dead ends: 560 [2022-11-20 11:02:37,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1199, Invalid=4653, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 11:02:37,867 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 431 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:37,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 197 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:02:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-20 11:02:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 349. [2022-11-20 11:02:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.3994252873563218) internal successors, (487), 348 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 487 transitions. [2022-11-20 11:02:38,206 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 487 transitions. Word has length 34 [2022-11-20 11:02:38,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:02:38,206 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 487 transitions. [2022-11-20 11:02:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:02:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 487 transitions. [2022-11-20 11:02:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 11:02:38,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:02:38,208 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:02:38,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 11:02:38,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 11:02:38,414 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:02:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:02:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash -688208292, now seen corresponding path program 12 times [2022-11-20 11:02:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:02:38,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137686755] [2022-11-20 11:02:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:02:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:02:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:02:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 11:02:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:02:38,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137686755] [2022-11-20 11:02:38,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137686755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:02:38,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213294093] [2022-11-20 11:02:38,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:02:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:02:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:02:38,891 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:02:38,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 11:02:39,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 11:02:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:02:39,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 11:02:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:02:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 11:02:39,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:02:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 11:02:39,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213294093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:02:39,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:02:39,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 35 [2022-11-20 11:02:39,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908176947] [2022-11-20 11:02:39,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:02:39,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:02:39,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:02:39,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:02:39,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:02:39,569 INFO L87 Difference]: Start difference. First operand 349 states and 487 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:23,775 INFO L93 Difference]: Finished difference Result 877 states and 1306 transitions. [2022-11-20 11:03:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 11:03:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-20 11:03:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:23,778 INFO L225 Difference]: With dead ends: 877 [2022-11-20 11:03:23,779 INFO L226 Difference]: Without dead ends: 870 [2022-11-20 11:03:23,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=1401, Invalid=3569, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 11:03:23,780 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 364 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:23,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 327 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 11:03:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-11-20 11:03:24,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 532. [2022-11-20 11:03:24,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.5254237288135593) internal successors, (810), 531 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 810 transitions. [2022-11-20 11:03:24,264 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 810 transitions. Word has length 34 [2022-11-20 11:03:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:24,264 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 810 transitions. [2022-11-20 11:03:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 810 transitions. [2022-11-20 11:03:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:03:24,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:24,266 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:24,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-11-20 11:03:24,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:24,471 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:03:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:24,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1710253052, now seen corresponding path program 17 times [2022-11-20 11:03:24,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:24,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739284632] [2022-11-20 11:03:24,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:24,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 11:03:24,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739284632] [2022-11-20 11:03:24,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739284632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:24,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824461354] [2022-11-20 11:03:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:03:24,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:24,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:24,774 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:24,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 11:03:28,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 11:03:28,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:28,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 11:03:28,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 11:03:28,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-20 11:03:29,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824461354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:29,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 14] total 35 [2022-11-20 11:03:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538691339] [2022-11-20 11:03:29,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 11:03:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 11:03:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 11:03:29,274 INFO L87 Difference]: Start difference. First operand 532 states and 810 transitions. Second operand has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:33,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:03:33,926 INFO L93 Difference]: Finished difference Result 733 states and 1011 transitions. [2022-11-20 11:03:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 11:03:33,926 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-20 11:03:33,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:03:33,929 INFO L225 Difference]: With dead ends: 733 [2022-11-20 11:03:33,929 INFO L226 Difference]: Without dead ends: 643 [2022-11-20 11:03:33,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=433, Invalid=3107, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 11:03:33,930 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 11:03:33,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 274 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 11:03:33,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-11-20 11:03:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 504. [2022-11-20 11:03:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.5089463220675945) internal successors, (759), 503 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 759 transitions. [2022-11-20 11:03:34,352 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 759 transitions. Word has length 36 [2022-11-20 11:03:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:03:34,352 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 759 transitions. [2022-11-20 11:03:34,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 759 transitions. [2022-11-20 11:03:34,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:03:34,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:03:34,354 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:34,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:34,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 11:03:34,561 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 11:03:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1659911713, now seen corresponding path program 18 times [2022-11-20 11:03:34,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:34,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341943051] [2022-11-20 11:03:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:34,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:03:35,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341943051] [2022-11-20 11:03:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341943051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318879594] [2022-11-20 11:03:35,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:03:35,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:35,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:35,034 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:35,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6dc8d3b1-f06e-47f8-a873-a9c0e7ceb039/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 11:03:35,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 11:03:35,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 11:03:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:03:36,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:36,749 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 11:03:36,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318879594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:36,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:36,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 39 [2022-11-20 11:03:36,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901988163] [2022-11-20 11:03:36,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:36,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 11:03:36,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 11:03:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1152, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 11:03:36,751 INFO L87 Difference]: Start difference. First operand 504 states and 759 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 39 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:54,398 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:11,200 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:04:21,701 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:05:01,754 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:05:13,645 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:05:26,640 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:06:03,547 WARN L233 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)