./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R --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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- 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-38b53e6 [2022-11-25 17:04:21,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:04:21,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:04:21,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:04:21,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:04:21,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:04:21,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:04:21,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:04:21,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:04:21,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:04:21,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:04:21,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:04:21,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:04:21,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:04:21,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:04:21,714 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:04:21,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:04:21,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:04:21,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:04:21,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:04:21,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:04:21,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:04:21,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:04:21,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:04:21,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:04:21,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:04:21,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:04:21,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:04:21,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:04:21,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:04:21,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:04:21,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:04:21,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:04:21,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:04:21,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:04:21,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:04:21,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:04:21,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:04:21,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:04:21,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:04:21,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:04:21,768 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:04:21,813 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:04:21,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:04:21,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:04:21,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:04:21,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:04:21,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:04:21,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:04:21,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:04:21,817 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:04:21,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:04:21,819 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:04:21,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:04:21,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:04:21,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:04:21,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:04:21,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:04:21,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:04:21,821 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:04:21,821 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:04:21,821 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:04:21,821 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:04:21,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:04:21,822 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:04:21,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:04:21,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:04:21,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:04:21,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:04:21,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:04:21,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:04:21,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:04:21,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:04:21,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:04:21,825 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:04:21,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:04:21,825 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2022-11-25 17:04:22,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:04:22,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:04:22,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:04:22,224 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:04:22,225 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:04:22,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-25 17:04:25,345 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:04:25,622 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:04:25,633 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2022-11-25 17:04:25,643 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/data/6dc7189af/8561f45d6c954fa3b900c5f9e388de9a/FLAG4033622eb [2022-11-25 17:04:25,671 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/data/6dc7189af/8561f45d6c954fa3b900c5f9e388de9a [2022-11-25 17:04:25,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:04:25,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:04:25,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:04:25,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:04:25,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:04:25,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:04:25" (1/1) ... [2022-11-25 17:04:25,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46c22b05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:25, skipping insertion in model container [2022-11-25 17:04:25,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:04:25" (1/1) ... [2022-11-25 17:04:25,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:04:25,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:04:25,959 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_9bc146bc-363b-47ea-b1b6-097e20ca5501/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-25 17:04:26,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:04:26,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:04:26,041 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_9bc146bc-363b-47ea-b1b6-097e20ca5501/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2022-11-25 17:04:26,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:04:26,112 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:04:26,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26 WrapperNode [2022-11-25 17:04:26,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:04:26,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:04:26,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:04:26,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:04:26,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,158 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2022-11-25 17:04:26,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:04:26,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:04:26,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:04:26,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:04:26,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:04:26,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:04:26,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:04:26,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:04:26,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (1/1) ... [2022-11-25 17:04:26,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:04:26,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:26,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:04:26,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:04:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:04:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:04:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-11-25 17:04:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-11-25 17:04:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:04:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:04:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:04:26,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:04:26,374 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:04:26,377 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:04:26,807 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:04:26,824 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:04:26,830 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:04:26,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:04:26 BoogieIcfgContainer [2022-11-25 17:04:26,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:04:26,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:04:26,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:04:26,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:04:26,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:04:25" (1/3) ... [2022-11-25 17:04:26,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162174c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:04:26, skipping insertion in model container [2022-11-25 17:04:26,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:04:26" (2/3) ... [2022-11-25 17:04:26,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@162174c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:04:26, skipping insertion in model container [2022-11-25 17:04:26,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:04:26" (3/3) ... [2022-11-25 17:04:26,852 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2022-11-25 17:04:26,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:04:26,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:04:26,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:04:26,976 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;@2da026b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:04:26,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:04:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-25 17:04:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 17:04:26,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:26,994 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:26,995 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:27,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:27,001 INFO L85 PathProgramCache]: Analyzing trace with hash -674615112, now seen corresponding path program 1 times [2022-11-25 17:04:27,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985997371] [2022-11-25 17:04:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:27,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:04:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 17:04:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:04:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:27,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985997371] [2022-11-25 17:04:27,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985997371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:04:27,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:04:27,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:04:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602332836] [2022-11-25 17:04:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:27,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:04:27,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:27,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:04:27,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:04:27,517 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:27,589 INFO L93 Difference]: Finished difference Result 150 states and 236 transitions. [2022-11-25 17:04:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:04:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-25 17:04:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:27,603 INFO L225 Difference]: With dead ends: 150 [2022-11-25 17:04:27,603 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 17:04:27,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:04:27,612 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:27,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 210 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:04:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 17:04:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-25 17:04:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 17:04:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2022-11-25 17:04:27,670 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 41 [2022-11-25 17:04:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:27,672 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2022-11-25 17:04:27,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2022-11-25 17:04:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:04:27,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:27,676 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:27,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:04:27,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:27,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1043963262, now seen corresponding path program 1 times [2022-11-25 17:04:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:27,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169000890] [2022-11-25 17:04:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:04:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 17:04:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:04:27,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:27,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169000890] [2022-11-25 17:04:27,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169000890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:04:27,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:04:27,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:04:27,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128625370] [2022-11-25 17:04:27,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:04:27,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:04:27,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:04:27,860 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:27,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:27,915 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2022-11-25 17:04:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:04:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-25 17:04:27,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:27,925 INFO L225 Difference]: With dead ends: 78 [2022-11-25 17:04:27,926 INFO L226 Difference]: Without dead ends: 68 [2022-11-25 17:04:27,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:04:27,929 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 292 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 [2022-11-25 17:04:27,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 292 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:04:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-25 17:04:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-25 17:04:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 17:04:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 99 transitions. [2022-11-25 17:04:27,944 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 99 transitions. Word has length 43 [2022-11-25 17:04:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:27,946 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 99 transitions. [2022-11-25 17:04:27,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 99 transitions. [2022-11-25 17:04:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:04:27,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:27,959 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:04:27,959 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 234616636, now seen corresponding path program 1 times [2022-11-25 17:04:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:27,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572869570] [2022-11-25 17:04:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:27,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:04:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 17:04:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572869570] [2022-11-25 17:04:28,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572869570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061642119] [2022-11-25 17:04:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:28,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:28,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:04:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:28,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:04:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:04:28,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:04:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061642119] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:28,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:04:28,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2022-11-25 17:04:28,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668046264] [2022-11-25 17:04:28,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:28,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:04:28,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:04:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:04:28,723 INFO L87 Difference]: Start difference. First operand 68 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:28,862 INFO L93 Difference]: Finished difference Result 139 states and 204 transitions. [2022-11-25 17:04:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:04:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-25 17:04:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:28,871 INFO L225 Difference]: With dead ends: 139 [2022-11-25 17:04:28,874 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 17:04:28,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:04:28,877 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 41 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:28,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:04:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 17:04:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2022-11-25 17:04:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 17:04:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2022-11-25 17:04:28,906 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 43 [2022-11-25 17:04:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:28,907 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2022-11-25 17:04:28,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:28,912 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2022-11-25 17:04:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:04:28,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:28,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:28,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:29,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:29,121 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -352189378, now seen corresponding path program 1 times [2022-11-25 17:04:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:29,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017771663] [2022-11-25 17:04:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-25 17:04:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-25 17:04:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017771663] [2022-11-25 17:04:29,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017771663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225602631] [2022-11-25 17:04:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:29,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:29,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:29,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:04:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:29,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:04:29,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:04:29,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 17:04:29,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225602631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:29,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:29,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2022-11-25 17:04:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410738852] [2022-11-25 17:04:29,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:29,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:04:29,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:29,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:04:29,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:04:29,726 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:04:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:30,076 INFO L93 Difference]: Finished difference Result 215 states and 325 transitions. [2022-11-25 17:04:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:04:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-25 17:04:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:30,079 INFO L225 Difference]: With dead ends: 215 [2022-11-25 17:04:30,079 INFO L226 Difference]: Without dead ends: 144 [2022-11-25 17:04:30,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:04:30,081 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 737 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:04:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-25 17:04:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2022-11-25 17:04:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 115 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2022-11-25 17:04:30,099 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 43 [2022-11-25 17:04:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:30,099 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2022-11-25 17:04:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:04:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2022-11-25 17:04:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:04:30,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:30,101 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:30,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:30,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:30,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:30,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:30,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1940694518, now seen corresponding path program 1 times [2022-11-25 17:04:30,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:30,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628359342] [2022-11-25 17:04:30,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:30,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:04:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:04:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628359342] [2022-11-25 17:04:30,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628359342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:30,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200003694] [2022-11-25 17:04:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:30,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:30,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:30,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:04:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:04:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:30,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:04:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200003694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:04:30,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:04:30,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-25 17:04:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309485840] [2022-11-25 17:04:30,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:30,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:04:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:30,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:04:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:04:30,527 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:04:30,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:30,592 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2022-11-25 17:04:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:04:30,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2022-11-25 17:04:30,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:30,598 INFO L225 Difference]: With dead ends: 256 [2022-11-25 17:04:30,598 INFO L226 Difference]: Without dead ends: 136 [2022-11-25 17:04:30,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:04:30,604 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 20 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:30,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 252 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:04:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-25 17:04:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2022-11-25 17:04:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 17:04:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2022-11-25 17:04:30,637 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 48 [2022-11-25 17:04:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:30,638 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2022-11-25 17:04:30,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:04:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2022-11-25 17:04:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 17:04:30,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:30,643 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:30,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:30,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -740139086, now seen corresponding path program 1 times [2022-11-25 17:04:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:30,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800816935] [2022-11-25 17:04:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 17:04:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-25 17:04:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:30,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:30,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800816935] [2022-11-25 17:04:30,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800816935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:30,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200340472] [2022-11-25 17:04:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:30,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:30,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:30,971 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:30,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:04:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:04:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:31,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:31,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200340472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:31,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:31,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 17:04:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569740392] [2022-11-25 17:04:31,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:31,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 17:04:31,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:31,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 17:04:31,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:04:31,212 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:31,427 INFO L93 Difference]: Finished difference Result 330 states and 506 transitions. [2022-11-25 17:04:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:04:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-25 17:04:31,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:31,439 INFO L225 Difference]: With dead ends: 330 [2022-11-25 17:04:31,439 INFO L226 Difference]: Without dead ends: 205 [2022-11-25 17:04:31,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:04:31,442 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 170 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:31,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 447 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:04:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-25 17:04:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 146. [2022-11-25 17:04:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.455223880597015) internal successors, (195), 134 states have internal predecessors, (195), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 17:04:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 219 transitions. [2022-11-25 17:04:31,483 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 219 transitions. Word has length 51 [2022-11-25 17:04:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:31,485 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 219 transitions. [2022-11-25 17:04:31,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 219 transitions. [2022-11-25 17:04:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:04:31,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:31,488 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:31,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:31,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:04:31,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1188656450, now seen corresponding path program 1 times [2022-11-25 17:04:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:31,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432830640] [2022-11-25 17:04:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:04:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 17:04:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:31,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:31,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432830640] [2022-11-25 17:04:31,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432830640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:31,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519756651] [2022-11-25 17:04:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:31,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:31,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:31,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:31,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:04:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:04:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:32,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:04:32,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519756651] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:32,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:04:32,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2022-11-25 17:04:32,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720748922] [2022-11-25 17:04:32,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:04:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:04:32,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:04:32,171 INFO L87 Difference]: Start difference. First operand 146 states and 219 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:32,239 INFO L93 Difference]: Finished difference Result 169 states and 243 transitions. [2022-11-25 17:04:32,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:04:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-25 17:04:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:32,241 INFO L225 Difference]: With dead ends: 169 [2022-11-25 17:04:32,241 INFO L226 Difference]: Without dead ends: 163 [2022-11-25 17:04:32,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:04:32,243 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 22 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:32,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:04:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-25 17:04:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2022-11-25 17:04:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4161073825503356) internal successors, (211), 149 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-25 17:04:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2022-11-25 17:04:32,257 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 53 [2022-11-25 17:04:32,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:32,258 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2022-11-25 17:04:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2022-11-25 17:04:32,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:04:32,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:32,260 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:32,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:32,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:32,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1245914752, now seen corresponding path program 1 times [2022-11-25 17:04:32,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:32,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863826290] [2022-11-25 17:04:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:32,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:04:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 17:04:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:04:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863826290] [2022-11-25 17:04:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863826290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:04:32,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:04:32,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:04:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174464224] [2022-11-25 17:04:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:32,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:04:32,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:04:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:04:32,599 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:32,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:32,642 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2022-11-25 17:04:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:04:32,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2022-11-25 17:04:32,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:32,647 INFO L225 Difference]: With dead ends: 167 [2022-11-25 17:04:32,647 INFO L226 Difference]: Without dead ends: 150 [2022-11-25 17:04:32,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:04:32,649 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:32,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:04:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-25 17:04:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-11-25 17:04:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2022-11-25 17:04:32,665 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 53 [2022-11-25 17:04:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:32,665 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2022-11-25 17:04:32,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:04:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2022-11-25 17:04:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:04:32,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:32,667 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:04:32,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 660451629, now seen corresponding path program 1 times [2022-11-25 17:04:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:32,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833950104] [2022-11-25 17:04:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 17:04:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 17:04:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:32,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833950104] [2022-11-25 17:04:32,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833950104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:32,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262012586] [2022-11-25 17:04:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:32,853 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:04:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:04:32,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:33,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:04:33,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262012586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:04:33,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:04:33,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-25 17:04:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161844303] [2022-11-25 17:04:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:04:33,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:04:33,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:33,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:04:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:04:33,006 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:04:33,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:33,149 INFO L93 Difference]: Finished difference Result 321 states and 469 transitions. [2022-11-25 17:04:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:04:33,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2022-11-25 17:04:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:33,152 INFO L225 Difference]: With dead ends: 321 [2022-11-25 17:04:33,152 INFO L226 Difference]: Without dead ends: 178 [2022-11-25 17:04:33,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:04:33,155 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 29 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:33,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 322 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:04:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-25 17:04:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2022-11-25 17:04:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2022-11-25 17:04:33,177 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 55 [2022-11-25 17:04:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:33,177 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2022-11-25 17:04:33,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:04:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2022-11-25 17:04:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 17:04:33,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:33,178 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:33,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:33,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:33,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 340970481, now seen corresponding path program 1 times [2022-11-25 17:04:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:33,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51754947] [2022-11-25 17:04:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-25 17:04:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:04:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:33,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51754947] [2022-11-25 17:04:33,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51754947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:33,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149061881] [2022-11-25 17:04:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:33,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:33,556 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:33,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:04:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:33,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:04:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:33,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149061881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:33,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:33,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 17:04:33,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954222828] [2022-11-25 17:04:33,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:33,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:04:33,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:33,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:04:33,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:04:33,846 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:04:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:34,492 INFO L93 Difference]: Finished difference Result 343 states and 506 transitions. [2022-11-25 17:04:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:04:34,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2022-11-25 17:04:34,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:34,494 INFO L225 Difference]: With dead ends: 343 [2022-11-25 17:04:34,494 INFO L226 Difference]: Without dead ends: 200 [2022-11-25 17:04:34,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:04:34,496 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 148 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:34,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 500 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:04:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-25 17:04:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2022-11-25 17:04:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.416058394160584) internal successors, (194), 138 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 215 transitions. [2022-11-25 17:04:34,515 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 215 transitions. Word has length 58 [2022-11-25 17:04:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:34,516 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 215 transitions. [2022-11-25 17:04:34,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:04:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 215 transitions. [2022-11-25 17:04:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 17:04:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:34,532 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:34,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:34,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:04:34,732 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:34,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1788145183, now seen corresponding path program 1 times [2022-11-25 17:04:34,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:34,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121607165] [2022-11-25 17:04:34,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:34,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:34,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:34,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:34,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:34,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-25 17:04:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:34,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-25 17:04:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:34,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121607165] [2022-11-25 17:04:34,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121607165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:34,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813348260] [2022-11-25 17:04:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:34,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:34,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:04:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:35,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:04:35,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:35,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:35,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813348260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:35,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:35,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-11-25 17:04:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601756596] [2022-11-25 17:04:35,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:04:35,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:04:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:04:35,362 INFO L87 Difference]: Start difference. First operand 149 states and 215 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:35,719 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2022-11-25 17:04:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:04:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-25 17:04:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:35,723 INFO L225 Difference]: With dead ends: 448 [2022-11-25 17:04:35,723 INFO L226 Difference]: Without dead ends: 306 [2022-11-25 17:04:35,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=294, Invalid=462, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:04:35,725 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 545 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:35,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 596 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:04:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-25 17:04:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2022-11-25 17:04:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.4487179487179487) internal successors, (226), 157 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2022-11-25 17:04:35,750 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 62 [2022-11-25 17:04:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:35,751 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2022-11-25 17:04:35,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2022-11-25 17:04:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-25 17:04:35,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:35,752 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:35,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:35,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:04:35,958 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash -71739151, now seen corresponding path program 2 times [2022-11-25 17:04:35,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:35,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728457530] [2022-11-25 17:04:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:35,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:36,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:36,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:04:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:36,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-25 17:04:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:36,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728457530] [2022-11-25 17:04:36,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728457530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:36,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220710810] [2022-11-25 17:04:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:04:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:36,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:36,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:04:36,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:04:36,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:36,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:04:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:36,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:37,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220710810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:37,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:37,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-25 17:04:37,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677562275] [2022-11-25 17:04:37,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:37,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:04:37,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:37,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:04:37,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:04:37,078 INFO L87 Difference]: Start difference. First operand 168 states and 247 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:04:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:56,645 INFO L93 Difference]: Finished difference Result 421 states and 630 transitions. [2022-11-25 17:04:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:04:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-11-25 17:04:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:56,648 INFO L225 Difference]: With dead ends: 421 [2022-11-25 17:04:56,648 INFO L226 Difference]: Without dead ends: 260 [2022-11-25 17:04:56,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=499, Invalid=902, Unknown=5, NotChecked=0, Total=1406 [2022-11-25 17:04:56,650 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 283 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:56,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1050 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 17:04:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-25 17:04:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 173. [2022-11-25 17:04:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.453416149068323) internal successors, (234), 162 states have internal predecessors, (234), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2022-11-25 17:04:56,671 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 70 [2022-11-25 17:04:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:56,672 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2022-11-25 17:04:56,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:04:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2022-11-25 17:04:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:04:56,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:56,674 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:56,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:56,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:04:56,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:56,885 INFO L85 PathProgramCache]: Analyzing trace with hash 270194017, now seen corresponding path program 2 times [2022-11-25 17:04:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:56,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035430460] [2022-11-25 17:04:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:57,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:57,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:57,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-25 17:04:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:57,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-25 17:04:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:57,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:04:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035430460] [2022-11-25 17:04:57,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035430460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:04:57,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629313687] [2022-11-25 17:04:57,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:04:57,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:04:57,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:04:57,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:04:57,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:04:57,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:04:57,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:04:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:04:57,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:04:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:04:57,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:04:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:04:58,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629313687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:04:58,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:04:58,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-11-25 17:04:58,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920456505] [2022-11-25 17:04:58,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:04:58,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:04:58,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:04:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:04:58,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:04:58,377 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:59,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:04:59,157 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2022-11-25 17:04:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 17:04:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-25 17:04:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:04:59,162 INFO L225 Difference]: With dead ends: 658 [2022-11-25 17:04:59,162 INFO L226 Difference]: Without dead ends: 492 [2022-11-25 17:04:59,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1020, Invalid=1632, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 17:04:59,166 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 831 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:04:59,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 845 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:04:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-25 17:04:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 204. [2022-11-25 17:04:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.4895833333333333) internal successors, (286), 193 states have internal predecessors, (286), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-25 17:04:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 307 transitions. [2022-11-25 17:04:59,201 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 307 transitions. Word has length 80 [2022-11-25 17:04:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:04:59,201 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 307 transitions. [2022-11-25 17:04:59,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:04:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 307 transitions. [2022-11-25 17:04:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-25 17:04:59,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:04:59,203 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:04:59,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:04:59,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:04:59,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:04:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:04:59,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1417933553, now seen corresponding path program 3 times [2022-11-25 17:04:59,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:04:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598744346] [2022-11-25 17:04:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:04:59,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:04:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:04:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:04:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:04:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:00,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-11-25 17:05:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:00,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-25 17:05:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:05:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:05:00,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:05:00,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598744346] [2022-11-25 17:05:00,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598744346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:05:00,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119391730] [2022-11-25 17:05:00,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:05:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:05:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:05:00,276 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:05:00,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:05:01,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-25 17:05:01,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:05:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-25 17:05:01,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:05:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:05:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:05:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 10 proven. 282 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:05:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119391730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:05:06,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:05:06,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 28, 29] total 71 [2022-11-25 17:05:06,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228857901] [2022-11-25 17:05:06,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:05:06,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 17:05:06,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:05:06,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 17:05:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4496, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 17:05:06,103 INFO L87 Difference]: Start difference. First operand 204 states and 307 transitions. Second operand has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:05:12,782 WARN L233 SmtUtils]: Spent 5.84s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:05:19,618 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:05:25,396 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:05:31,489 WARN L233 SmtUtils]: Spent 5.47s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:05:43,848 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:06:03,224 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:07:26,145 WARN L233 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:07:31,959 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:07:39,403 WARN L233 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:07:49,086 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:08:05,602 WARN L233 SmtUtils]: Spent 9.46s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:08:35,024 WARN L233 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:09:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:46,625 INFO L93 Difference]: Finished difference Result 1331 states and 2487 transitions. [2022-11-25 17:09:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2022-11-25 17:09:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 94 [2022-11-25 17:09:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:46,637 INFO L225 Difference]: With dead ends: 1331 [2022-11-25 17:09:46,638 INFO L226 Difference]: Without dead ends: 1127 [2022-11-25 17:09:46,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49663 ImplicationChecksByTransitivity, 261.3s TimeCoverageRelationStatistics Valid=20293, Invalid=107513, Unknown=0, NotChecked=0, Total=127806 [2022-11-25 17:09:46,682 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 6863 mSDsluCounter, 7964 mSDsCounter, 0 mSdLazyCounter, 12168 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6962 SdHoareTripleChecker+Valid, 8200 SdHoareTripleChecker+Invalid, 12729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 12168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:46,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6962 Valid, 8200 Invalid, 12729 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 12168 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2022-11-25 17:09:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-25 17:09:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 239. [2022-11-25 17:09:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 224 states have (on average 1.5044642857142858) internal successors, (337), 226 states have internal predecessors, (337), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-25 17:09:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 373 transitions. [2022-11-25 17:09:46,906 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 373 transitions. Word has length 94 [2022-11-25 17:09:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:46,906 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 373 transitions. [2022-11-25 17:09:46,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.859154929577465) internal successors, (203), 67 states have internal predecessors, (203), 4 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:09:46,907 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 373 transitions. [2022-11-25 17:09:46,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 17:09:46,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:46,909 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:46,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:09:47,116 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1636741129, now seen corresponding path program 1 times [2022-11-25 17:09:47,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489216730] [2022-11-25 17:09:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:47,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:47,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:09:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:09:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-25 17:09:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-25 17:09:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:09:47,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:47,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489216730] [2022-11-25 17:09:47,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489216730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:09:47,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580163447] [2022-11-25 17:09:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:47,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:47,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:47,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:47,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:09:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:09:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2022-11-25 17:09:48,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:48,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580163447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:48,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:09:48,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [19] total 21 [2022-11-25 17:09:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783527134] [2022-11-25 17:09:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:09:48,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:09:48,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:09:48,058 INFO L87 Difference]: Start difference. First operand 239 states and 373 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:09:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:48,146 INFO L93 Difference]: Finished difference Result 491 states and 790 transitions. [2022-11-25 17:09:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:09:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 98 [2022-11-25 17:09:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:48,149 INFO L225 Difference]: With dead ends: 491 [2022-11-25 17:09:48,149 INFO L226 Difference]: Without dead ends: 259 [2022-11-25 17:09:48,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:09:48,153 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:48,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 277 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:09:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-25 17:09:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 245. [2022-11-25 17:09:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 230 states have (on average 1.491304347826087) internal successors, (343), 232 states have internal predecessors, (343), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-25 17:09:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 379 transitions. [2022-11-25 17:09:48,243 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 379 transitions. Word has length 98 [2022-11-25 17:09:48,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:48,244 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 379 transitions. [2022-11-25 17:09:48,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:09:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 379 transitions. [2022-11-25 17:09:48,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-25 17:09:48,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:48,249 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:48,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:48,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:09:48,456 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1245904171, now seen corresponding path program 1 times [2022-11-25 17:09:48,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:48,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801927825] [2022-11-25 17:09:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:48,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:09:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:48,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:09:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:49,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-25 17:09:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:49,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-25 17:09:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:09:49,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:49,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801927825] [2022-11-25 17:09:49,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801927825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:09:49,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050857821] [2022-11-25 17:09:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:49,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:49,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:49,418 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:49,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:09:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:09:49,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 25 proven. 315 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:09:50,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:09:51,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050857821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:51,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:09:51,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2022-11-25 17:09:51,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274161520] [2022-11-25 17:09:51,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:51,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-25 17:09:51,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-25 17:09:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 17:09:51,502 INFO L87 Difference]: Start difference. First operand 245 states and 379 transitions. Second operand has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:10:25,314 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 54 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:10:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:26,131 INFO L93 Difference]: Finished difference Result 657 states and 1044 transitions. [2022-11-25 17:10:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-25 17:10:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 99 [2022-11-25 17:10:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:26,148 INFO L225 Difference]: With dead ends: 657 [2022-11-25 17:10:26,149 INFO L226 Difference]: Without dead ends: 419 [2022-11-25 17:10:26,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=1692, Invalid=4005, Unknown=3, NotChecked=0, Total=5700 [2022-11-25 17:10:26,154 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 745 mSDsluCounter, 2408 mSDsCounter, 0 mSdLazyCounter, 3491 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 3545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:26,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 2569 Invalid, 3545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3491 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 17:10:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-25 17:10:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 240. [2022-11-25 17:10:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 225 states have (on average 1.4844444444444445) internal successors, (334), 227 states have internal predecessors, (334), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-25 17:10:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 370 transitions. [2022-11-25 17:10:26,217 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 370 transitions. Word has length 99 [2022-11-25 17:10:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:26,217 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 370 transitions. [2022-11-25 17:10:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.769230769230769) internal successors, (196), 52 states have internal predecessors, (196), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:10:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 370 transitions. [2022-11-25 17:10:26,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-25 17:10:26,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:26,220 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:26,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:26,427 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash 870628449, now seen corresponding path program 3 times [2022-11-25 17:10:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:26,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756119104] [2022-11-25 17:10:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:26,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:10:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:26,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:10:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:27,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-11-25 17:10:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-25 17:10:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:10:27,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:27,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756119104] [2022-11-25 17:10:27,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756119104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105955835] [2022-11-25 17:10:27,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:10:27,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:27,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:27,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:27,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:10:28,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-25 17:10:28,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:10:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:10:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:10:28,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:10:30,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105955835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:10:30,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:10:30,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2022-11-25 17:10:30,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447249056] [2022-11-25 17:10:30,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:30,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-25 17:10:30,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-25 17:10:30,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 17:10:30,783 INFO L87 Difference]: Start difference. First operand 240 states and 370 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:10:33,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:10:33,771 INFO L93 Difference]: Finished difference Result 1225 states and 2089 transitions. [2022-11-25 17:10:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-25 17:10:33,776 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2022-11-25 17:10:33,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:10:33,784 INFO L225 Difference]: With dead ends: 1225 [2022-11-25 17:10:33,784 INFO L226 Difference]: Without dead ends: 992 [2022-11-25 17:10:33,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3768, Invalid=6132, Unknown=0, NotChecked=0, Total=9900 [2022-11-25 17:10:33,789 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3105 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3105 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 17:10:33,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3105 Valid, 1224 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 17:10:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-11-25 17:10:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 294. [2022-11-25 17:10:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 279 states have (on average 1.5197132616487454) internal successors, (424), 281 states have internal predecessors, (424), 8 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (28), 9 states have call predecessors, (28), 7 states have call successors, (28) [2022-11-25 17:10:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 460 transitions. [2022-11-25 17:10:33,914 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 460 transitions. Word has length 116 [2022-11-25 17:10:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:10:33,914 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 460 transitions. [2022-11-25 17:10:33,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-25 17:10:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 460 transitions. [2022-11-25 17:10:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-25 17:10:33,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:10:33,917 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:10:33,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:10:34,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:10:34,125 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:10:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:10:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash -169172583, now seen corresponding path program 2 times [2022-11-25 17:10:34,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:10:34,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021713828] [2022-11-25 17:10:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:10:34,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:10:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:35,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 17:10:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:10:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:38,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-11-25 17:10:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:38,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-25 17:10:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:10:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:10:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:10:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021713828] [2022-11-25 17:10:38,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021713828] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:10:38,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100496732] [2022-11-25 17:10:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:10:38,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:10:38,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:10:38,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:10:38,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bc146bc-363b-47ea-b1b6-097e20ca5501/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:10:38,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:10:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:10:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-25 17:10:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:10:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:10:41,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:10:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:10:50,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100496732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:10:50,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:10:50,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 103 [2022-11-25 17:10:50,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313223352] [2022-11-25 17:10:50,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:10:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-25 17:10:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:10:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-25 17:10:50,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=9308, Unknown=0, NotChecked=0, Total=10506 [2022-11-25 17:10:50,786 INFO L87 Difference]: Start difference. First operand 294 states and 460 transitions. Second operand has 103 states, 103 states have (on average 2.883495145631068) internal successors, (297), 99 states have internal predecessors, (297), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-25 17:14:00,722 WARN L233 SmtUtils]: Spent 3.16m on a formula simplification. DAG size of input: 512 DAG size of output: 369 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:14:02,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:14:55,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:14:58,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:15:00,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:17:06,724 WARN L233 SmtUtils]: Spent 2.03m on a formula simplification. DAG size of input: 495 DAG size of output: 358 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:19:07,414 WARN L233 SmtUtils]: Spent 2.00m on a formula simplification. DAG size of input: 500 DAG size of output: 357 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)