./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/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 d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 --- 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 15:49:01,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:49:01,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:49:01,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:49:01,786 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:49:01,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:49:01,789 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:49:01,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:49:01,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:49:01,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:49:01,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:49:01,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:49:01,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:49:01,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:49:01,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:49:01,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:49:01,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:49:01,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:49:01,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:49:01,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:49:01,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:49:01,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:49:01,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:49:01,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:49:01,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:49:01,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:49:01,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:49:01,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:49:01,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:49:01,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:49:01,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:49:01,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:49:01,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:49:01,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:49:01,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:49:01,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:49:01,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:49:01,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:49:01,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:49:01,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:49:01,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:49:01,853 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:49:01,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:49:01,876 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:49:01,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:49:01,877 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:49:01,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:49:01,878 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:49:01,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:49:01,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:49:01,879 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:49:01,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:49:01,879 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:49:01,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:49:01,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:49:01,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:49:01,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:49:01,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:49:01,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:49:01,881 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:49:01,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:49:01,881 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:49:01,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:49:01,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:49:01,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:49:01,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:49:01,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:49:01,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:49:01,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:49:01,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:49:01,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:49:01,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:49:01,883 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:49:01,884 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:49:01,884 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:49:01,884 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:49:01,884 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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2022-11-25 15:49:02,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:49:02,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:49:02,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:49:02,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:49:02,268 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:49:02,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-25 15:49:05,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:49:05,564 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:49:05,565 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-25 15:49:05,572 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data/9ea2431d3/abfabc94c5d54ff69f0d358272ae8459/FLAG2eba69104 [2022-11-25 15:49:05,595 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data/9ea2431d3/abfabc94c5d54ff69f0d358272ae8459 [2022-11-25 15:49:05,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:49:05,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:49:05,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:49:05,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:49:05,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:49:05,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ca0057a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05, skipping insertion in model container [2022-11-25 15:49:05,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,620 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:49:05,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:49:05,862 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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-25 15:49:05,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:49:05,883 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:49:05,905 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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-25 15:49:05,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:49:05,919 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:49:05,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05 WrapperNode [2022-11-25 15:49:05,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:49:05,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:49:05,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:49:05,921 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:49:05,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,955 INFO L138 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-11-25 15:49:05,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:49:05,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:49:05,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:49:05,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:49:05,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,981 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:05,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:49:05,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:49:05,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:49:05,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:49:05,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (1/1) ... [2022-11-25 15:49:06,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:49:06,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:06,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:49:06,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:49:06,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:49:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:49:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:49:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:49:06,065 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-25 15:49:06,066 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-25 15:49:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:49:06,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:49:06,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:49:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:49:06,142 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:49:06,145 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:49:06,370 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:49:06,377 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:49:06,378 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:49:06,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:06 BoogieIcfgContainer [2022-11-25 15:49:06,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:49:06,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:49:06,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:49:06,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:49:06,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:49:05" (1/3) ... [2022-11-25 15:49:06,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039dd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:49:06, skipping insertion in model container [2022-11-25 15:49:06,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:49:05" (2/3) ... [2022-11-25 15:49:06,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039dd69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:49:06, skipping insertion in model container [2022-11-25 15:49:06,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:06" (3/3) ... [2022-11-25 15:49:06,392 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2022-11-25 15:49:06,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:49:06,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:49:06,551 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:49:06,573 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;@4ae422e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:49:06,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:49:06,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:49:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:49:06,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:06,608 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:06,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:06,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash 626669782, now seen corresponding path program 1 times [2022-11-25 15:49:06,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:06,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820229098] [2022-11-25 15:49:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:06,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-25 15:49:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-25 15:49:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:49:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:49:07,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820229098] [2022-11-25 15:49:07,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820229098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:07,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:49:07,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:49:07,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766713719] [2022-11-25 15:49:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:07,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:49:07,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:49:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:49:07,160 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:49:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:07,263 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2022-11-25 15:49:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:49:07,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 15:49:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:07,273 INFO L225 Difference]: With dead ends: 59 [2022-11-25 15:49:07,273 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 15:49:07,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 15:49:07,280 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:07,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:49:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 15:49:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-25 15:49:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:49:07,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-25 15:49:07,323 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 29 [2022-11-25 15:49:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:07,324 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-25 15:49:07,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:49:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-25 15:49:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 15:49:07,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:07,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:07,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:49:07,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:07,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1866809336, now seen corresponding path program 1 times [2022-11-25 15:49:07,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:07,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706266459] [2022-11-25 15:49:07,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:07,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-25 15:49:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 15:49:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-25 15:49:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:49:07,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:07,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706266459] [2022-11-25 15:49:07,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706266459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:07,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344749892] [2022-11-25 15:49:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:07,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:07,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:07,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:07,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:49:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:49:07,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:49:07,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:49:07,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344749892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:07,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:07,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-11-25 15:49:07,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630611306] [2022-11-25 15:49:07,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 15:49:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 15:49:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 15:49:07,808 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:49:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:07,922 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-11-25 15:49:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 15:49:07,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) Word has length 31 [2022-11-25 15:49:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:07,924 INFO L225 Difference]: With dead ends: 56 [2022-11-25 15:49:07,924 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 15:49:07,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-25 15:49:07,926 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:07,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 101 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:49:07,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 15:49:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-11-25 15:49:07,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:49:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-25 15:49:07,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 31 [2022-11-25 15:49:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:07,934 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-25 15:49:07,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (7), 1 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 15:49:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-25 15:49:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 15:49:07,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:07,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:07,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:08,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:08,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:08,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1980507627, now seen corresponding path program 1 times [2022-11-25 15:49:08,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:08,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894803551] [2022-11-25 15:49:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:08,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 15:49:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:08,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-25 15:49:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:49:08,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:08,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894803551] [2022-11-25 15:49:08,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894803551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:08,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951844342] [2022-11-25 15:49:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:08,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:08,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:49:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:49:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 15:49:08,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:49:08,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951844342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:49:08,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 15:49:08,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-25 15:49:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913830465] [2022-11-25 15:49:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:49:08,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:49:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:08,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:49:08,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:49:08,579 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:49:08,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:08,631 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-11-25 15:49:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:49:08,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-11-25 15:49:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:08,634 INFO L225 Difference]: With dead ends: 48 [2022-11-25 15:49:08,635 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 15:49:08,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:49:08,638 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:08,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:49:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 15:49:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-25 15:49:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:49:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-25 15:49:08,650 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 45 [2022-11-25 15:49:08,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:08,652 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-25 15:49:08,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:49:08,652 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-25 15:49:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 15:49:08,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:08,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:08,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:08,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:08,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 313275475, now seen corresponding path program 1 times [2022-11-25 15:49:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:08,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539078048] [2022-11-25 15:49:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:09,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 15:49:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:09,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 15:49:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-25 15:49:10,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:10,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539078048] [2022-11-25 15:49:10,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539078048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356006651] [2022-11-25 15:49:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:10,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:10,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:10,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:49:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 15:49:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 15:49:10,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 15:49:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356006651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:11,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:11,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 16 [2022-11-25 15:49:11,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71968308] [2022-11-25 15:49:11,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:11,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 15:49:11,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 15:49:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:49:11,076 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:49:11,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:11,256 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2022-11-25 15:49:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:49:11,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-11-25 15:49:11,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:11,260 INFO L225 Difference]: With dead ends: 85 [2022-11-25 15:49:11,260 INFO L226 Difference]: Without dead ends: 61 [2022-11-25 15:49:11,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:49:11,261 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:11,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 302 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:49:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-25 15:49:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2022-11-25 15:49:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 15:49:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2022-11-25 15:49:11,275 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 47 [2022-11-25 15:49:11,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:11,276 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2022-11-25 15:49:11,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 15:49:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2022-11-25 15:49:11,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 15:49:11,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:11,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:11,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:11,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:11,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -905656161, now seen corresponding path program 1 times [2022-11-25 15:49:11,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:11,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015022068] [2022-11-25 15:49:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:11,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:12,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:12,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 15:49:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:12,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 15:49:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 15:49:12,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:12,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015022068] [2022-11-25 15:49:12,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015022068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:12,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996524680] [2022-11-25 15:49:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:12,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:12,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:12,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:49:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 15:49:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:13,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:49:13,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:13,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2022-11-25 15:49:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:13,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:13,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2022-11-25 15:49:13,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:49:13,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:13,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:13,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-11-25 15:49:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 15:49:14,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:15,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 263 treesize of output 231 [2022-11-25 15:49:15,782 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:15,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 256 treesize of output 222 [2022-11-25 15:49:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 15:49:15,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996524680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:15,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:15,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 19] total 49 [2022-11-25 15:49:15,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219939706] [2022-11-25 15:49:15,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:15,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 15:49:15,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:15,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 15:49:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=2041, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 15:49:15,957 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 49 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-25 15:49:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:20,216 INFO L93 Difference]: Finished difference Result 267 states and 365 transitions. [2022-11-25 15:49:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 15:49:20,217 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2022-11-25 15:49:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:20,223 INFO L225 Difference]: With dead ends: 267 [2022-11-25 15:49:20,223 INFO L226 Difference]: Without dead ends: 224 [2022-11-25 15:49:20,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1013, Invalid=6469, Unknown=0, NotChecked=0, Total=7482 [2022-11-25 15:49:20,227 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 334 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:20,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 431 Invalid, 1403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 15:49:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-25 15:49:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 171. [2022-11-25 15:49:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 143 states have (on average 1.2447552447552448) internal successors, (178), 151 states have internal predecessors, (178), 16 states have call successors, (16), 4 states have call predecessors, (16), 11 states have return successors, (55), 15 states have call predecessors, (55), 16 states have call successors, (55) [2022-11-25 15:49:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 249 transitions. [2022-11-25 15:49:20,275 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 249 transitions. Word has length 48 [2022-11-25 15:49:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:20,275 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 249 transitions. [2022-11-25 15:49:20,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 7 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 6 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-25 15:49:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 249 transitions. [2022-11-25 15:49:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 15:49:20,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:20,280 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:20,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:49:20,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:20,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 780335695, now seen corresponding path program 2 times [2022-11-25 15:49:20,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:20,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072263884] [2022-11-25 15:49:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:20,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:21,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:49:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:21,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-25 15:49:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:49:21,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072263884] [2022-11-25 15:49:21,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072263884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421263507] [2022-11-25 15:49:21,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:49:21,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:21,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:21,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:49:21,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:49:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:21,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 15:49:21,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:21,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-25 15:49:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:21,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:21,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-11-25 15:49:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 15:49:21,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-25 15:49:22,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421263507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:22,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:22,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 30 [2022-11-25 15:49:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117952001] [2022-11-25 15:49:22,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 15:49:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 15:49:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:49:22,299 INFO L87 Difference]: Start difference. First operand 171 states and 249 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 15:49:24,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:25,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:27,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:30,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:32,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:33,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:36,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:37,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:49:37,842 INFO L93 Difference]: Finished difference Result 367 states and 501 transitions. [2022-11-25 15:49:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:49:37,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-11-25 15:49:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:49:37,845 INFO L225 Difference]: With dead ends: 367 [2022-11-25 15:49:37,846 INFO L226 Difference]: Without dead ends: 226 [2022-11-25 15:49:37,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 15:49:37,849 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 96 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 26 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:49:37,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 404 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 647 Invalid, 9 Unknown, 0 Unchecked, 15.1s Time] [2022-11-25 15:49:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-25 15:49:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2022-11-25 15:49:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 172 states have (on average 1.2383720930232558) internal successors, (213), 180 states have internal predecessors, (213), 17 states have call successors, (17), 7 states have call predecessors, (17), 14 states have return successors, (50), 16 states have call predecessors, (50), 17 states have call successors, (50) [2022-11-25 15:49:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 280 transitions. [2022-11-25 15:49:37,888 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 280 transitions. Word has length 48 [2022-11-25 15:49:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:49:37,889 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 280 transitions. [2022-11-25 15:49:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 6 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-25 15:49:37,889 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 280 transitions. [2022-11-25 15:49:37,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 15:49:37,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:49:37,891 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:49:37,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 15:49:38,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 15:49:38,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:49:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:49:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1956902223, now seen corresponding path program 3 times [2022-11-25 15:49:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:49:38,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480246806] [2022-11-25 15:49:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:49:38,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:49:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:49:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:39,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:49:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 15:49:39,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:49:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:49:39,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:49:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480246806] [2022-11-25 15:49:39,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480246806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:49:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938387282] [2022-11-25 15:49:39,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:49:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:49:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:49:39,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:49:39,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 15:49:39,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 15:49:39,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:49:39,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-25 15:49:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:49:39,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:49:39,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:39,842 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:39,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-11-25 15:49:40,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:40,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:49:40,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 27 [2022-11-25 15:49:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:40,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:49:40,203 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-25 15:49:40,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 36 [2022-11-25 15:49:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:49:40,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:49:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 15:49:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938387282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:49:41,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:49:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 16] total 46 [2022-11-25 15:49:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668483784] [2022-11-25 15:49:41,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:49:41,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-25 15:49:41,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:49:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-25 15:49:42,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2022-11-25 15:49:42,000 INFO L87 Difference]: Start difference. First operand 204 states and 280 transitions. Second operand has 46 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:49:44,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:46,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:48,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:50,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:52,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:49:58,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:00,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:02,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:03,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:09,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:11,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:13,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:15,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:17,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:19,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:34,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:40,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:42,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:48,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:50,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:52,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:54,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:50:56,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:02,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:04,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:06,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:08,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:10,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:12,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:16,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:17,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:19,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:21,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:36,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:42,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:44,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:46,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:52,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:54,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:56,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:51:58,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:00,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:02,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:04,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:06,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:08,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:10,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:12,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:14,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:16,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:18,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:20,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:22,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:24,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:26,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:28,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 15:52:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:28,796 INFO L93 Difference]: Finished difference Result 424 states and 555 transitions. [2022-11-25 15:52:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-25 15:52:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-11-25 15:52:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:28,800 INFO L225 Difference]: With dead ends: 424 [2022-11-25 15:52:28,800 INFO L226 Difference]: Without dead ends: 343 [2022-11-25 15:52:28,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2551 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=1133, Invalid=7030, Unknown=27, NotChecked=0, Total=8190 [2022-11-25 15:52:28,810 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 320 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 127 mSolverCounterUnsat, 56 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 56 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:28,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 484 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1348 Invalid, 56 Unknown, 0 Unchecked, 109.4s Time] [2022-11-25 15:52:28,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-25 15:52:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 299. [2022-11-25 15:52:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 253 states have (on average 1.2292490118577075) internal successors, (311), 268 states have internal predecessors, (311), 26 states have call successors, (26), 11 states have call predecessors, (26), 19 states have return successors, (67), 19 states have call predecessors, (67), 26 states have call successors, (67) [2022-11-25 15:52:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 404 transitions. [2022-11-25 15:52:28,901 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 404 transitions. Word has length 49 [2022-11-25 15:52:28,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:28,901 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 404 transitions. [2022-11-25 15:52:28,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.4186046511627906) internal successors, (104), 43 states have internal predecessors, (104), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:52:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 404 transitions. [2022-11-25 15:52:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 15:52:28,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:28,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:28,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 15:52:29,110 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:29,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1733279233, now seen corresponding path program 1 times [2022-11-25 15:52:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041632184] [2022-11-25 15:52:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:31,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 15:52:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:31,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-25 15:52:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:32,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-25 15:52:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 15:52:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041632184] [2022-11-25 15:52:32,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041632184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:52:32,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17347728] [2022-11-25 15:52:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:32,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:32,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:32,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:32,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 15:52:32,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:32,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-25 15:52:32,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:32,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:52:33,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:52:33,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:52:33,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 46 [2022-11-25 15:52:33,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 56 [2022-11-25 15:52:34,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-25 15:52:34,955 INFO L321 Elim1Store]: treesize reduction 12, result has 77.4 percent of original size [2022-11-25 15:52:34,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 120 [2022-11-25 15:52:35,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:52:35,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:36,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 101 [2022-11-25 15:52:36,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:52:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 166 [2022-11-25 15:52:38,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-25 15:52:38,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:52:38,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 53 [2022-11-25 15:52:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:52:39,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17347728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:39,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:52:39,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 27] total 70 [2022-11-25 15:52:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301874264] [2022-11-25 15:52:39,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-25 15:52:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-25 15:52:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=4437, Unknown=0, NotChecked=0, Total=4830 [2022-11-25 15:52:39,027 INFO L87 Difference]: Start difference. First operand 299 states and 404 transitions. Second operand has 70 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 61 states have internal predecessors, (115), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:52:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:47,576 INFO L93 Difference]: Finished difference Result 454 states and 626 transitions. [2022-11-25 15:52:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 15:52:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 61 states have internal predecessors, (115), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) Word has length 50 [2022-11-25 15:52:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:47,587 INFO L225 Difference]: With dead ends: 454 [2022-11-25 15:52:47,587 INFO L226 Difference]: Without dead ends: 448 [2022-11-25 15:52:47,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3167 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1089, Invalid=10253, Unknown=0, NotChecked=0, Total=11342 [2022-11-25 15:52:47,592 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 288 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1925 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:47,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 211 Invalid, 2060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1925 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 15:52:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-25 15:52:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 371. [2022-11-25 15:52:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 313 states have (on average 1.255591054313099) internal successors, (393), 336 states have internal predecessors, (393), 32 states have call successors, (32), 11 states have call predecessors, (32), 25 states have return successors, (106), 23 states have call predecessors, (106), 32 states have call successors, (106) [2022-11-25 15:52:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 531 transitions. [2022-11-25 15:52:47,677 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 531 transitions. Word has length 50 [2022-11-25 15:52:47,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:47,677 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 531 transitions. [2022-11-25 15:52:47,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 63 states have (on average 1.8253968253968254) internal successors, (115), 61 states have internal predecessors, (115), 9 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 15:52:47,678 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 531 transitions. [2022-11-25 15:52:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 15:52:47,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:47,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:47,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 15:52:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:47,886 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:47,887 INFO L85 PathProgramCache]: Analyzing trace with hash 372932539, now seen corresponding path program 1 times [2022-11-25 15:52:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:47,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187230670] [2022-11-25 15:52:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:52:47,926 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:52:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:52:47,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:52:48,000 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:52:48,001 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 15:52:48,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 15:52:48,007 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:48,012 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 15:52:48,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 03:52:48 BoogieIcfgContainer [2022-11-25 15:52:48,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 15:52:48,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 15:52:48,091 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 15:52:48,092 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 15:52:48,092 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:49:06" (3/4) ... [2022-11-25 15:52:48,095 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 15:52:48,095 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 15:52:48,096 INFO L158 Benchmark]: Toolchain (without parser) took 222492.24ms. Allocated memory was 134.2MB in the beginning and 346.0MB in the end (delta: 211.8MB). Free memory was 68.1MB in the beginning and 272.8MB in the end (delta: -204.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 15:52:48,096 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 134.2MB. Free memory is still 108.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:52:48,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 314.30ms. Allocated memory was 134.2MB in the beginning and 165.7MB in the end (delta: 31.5MB). Free memory was 68.0MB in the beginning and 132.0MB in the end (delta: -64.0MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2022-11-25 15:52:48,097 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.71ms. Allocated memory is still 165.7MB. Free memory was 132.0MB in the beginning and 130.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 15:52:48,097 INFO L158 Benchmark]: Boogie Preprocessor took 27.86ms. Allocated memory is still 165.7MB. Free memory was 130.7MB in the beginning and 129.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:52:48,098 INFO L158 Benchmark]: RCFGBuilder took 395.13ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 132.5MB in the end (delta: -3.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 15:52:48,098 INFO L158 Benchmark]: TraceAbstraction took 221708.43ms. Allocated memory was 165.7MB in the beginning and 346.0MB in the end (delta: 180.4MB). Free memory was 131.3MB in the beginning and 272.8MB in the end (delta: -141.5MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. [2022-11-25 15:52:48,098 INFO L158 Benchmark]: Witness Printer took 4.22ms. Allocated memory is still 346.0MB. Free memory is still 272.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 15:52:48,105 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 134.2MB. Free memory is still 108.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 314.30ms. Allocated memory was 134.2MB in the beginning and 165.7MB in the end (delta: 31.5MB). Free memory was 68.0MB in the beginning and 132.0MB in the end (delta: -64.0MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.71ms. Allocated memory is still 165.7MB. Free memory was 132.0MB in the beginning and 130.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.86ms. Allocated memory is still 165.7MB. Free memory was 130.7MB in the beginning and 129.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 395.13ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 132.5MB in the end (delta: -3.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 221708.43ms. Allocated memory was 165.7MB in the beginning and 346.0MB in the end (delta: 180.4MB). Free memory was 131.3MB in the beginning and 272.8MB in the end (delta: -141.5MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. * Witness Printer took 4.22ms. Allocated memory is still 346.0MB. Free memory is still 272.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [i=0, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=1, N=2, x={9:0}] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [i=2, N=2, x={9:0}] [L40] COND FALSE !(i < N) VAL [i=2, N=2, x={9:0}] [L45] CALL, EXPR bAnd(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-2, x={9:0}, x={9:0}, x[i]=-2147483648] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, res=2147483646, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=2147483646, x={9:0}, x={9:0}] [L27] return res; VAL [\result=2147483646, i=2, N=2, res=2147483646, x={9:0}, x={9:0}] [L45] RET, EXPR bAnd(x) VAL [bAnd(x)=2147483646, i=2, N=2, x={9:0}] [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp VAL [i=2, N=2, ret=2147483646, temp=-2, x={9:0}] [L48] CALL, EXPR bAnd(x) VAL [N=2, x={9:0}] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [i=1, N=2, res=-2147483648, x={9:0}, x={9:0}] [L24] COND TRUE i < N [L25] EXPR x[i] VAL [i=1, N=2, res=-2147483648, x={9:0}, x={9:0}, x[i]=-2] [L25] res = res & x[i] [L24] i++ VAL [i=2, N=2, res=-2147483649, x={9:0}, x={9:0}] [L24] COND FALSE !(i < N) VAL [i=2, N=2, res=-2147483649, x={9:0}, x={9:0}] [L27] return res; VAL [\result=2147483647, i=2, N=2, res=-2147483649, x={9:0}, x={9:0}] [L48] RET, EXPR bAnd(x) VAL [bAnd(x)=2147483647, i=2, N=2, ret=2147483646, temp=-2, x={9:0}] [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [i=2, i=0, N=2, ret=2147483646, ret2=2147483647, temp=-2147483648, x={9:0}] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/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 -> d475be4701a825f0568ebf884900dce77e1216a215283bc51d05a41cc9a8ddb5 [2022-11-25 15:52:51,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:52:51,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:52:51,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:52:51,246 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:52:51,246 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:52:51,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-25 15:52:54,294 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:52:54,565 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:52:54,566 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i [2022-11-25 15:52:54,573 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data/f71a57f14/0fb96f0cd7784a0fafc69990203c00da/FLAG53b2de3b6 [2022-11-25 15:52:54,593 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/data/f71a57f14/0fb96f0cd7784a0fafc69990203c00da [2022-11-25 15:52:54,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:52:54,596 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:52:54,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:54,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:52:54,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:52:54,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569cebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54, skipping insertion in model container [2022-11-25 15:52:54,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:52:54,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:52:54,842 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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-25 15:52:54,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:54,857 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:52:54,881 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_8f890dcd-3cf3-41f3-9215-3248f7ce8104/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2022-11-25 15:52:54,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:52:54,897 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:52:54,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54 WrapperNode [2022-11-25 15:52:54,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:52:54,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:52:54,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:52:54,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:52:54,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,924 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,948 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 73 [2022-11-25 15:52:54,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:52:54,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:52:54,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:52:54,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:52:54,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,986 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:54,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:52:54,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:52:54,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:52:54,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:52:54,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (1/1) ... [2022-11-25 15:52:55,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:52:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:55,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:52:55,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:52:55,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:52:55,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 15:52:55,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:52:55,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 15:52:55,143 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2022-11-25 15:52:55,143 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2022-11-25 15:52:55,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:52:55,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:52:55,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:52:55,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 15:52:55,248 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:52:55,251 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:52:55,576 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:52:55,583 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:52:55,584 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:52:55,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:52:55 BoogieIcfgContainer [2022-11-25 15:52:55,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:52:55,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:52:55,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:52:55,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:52:55,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:52:54" (1/3) ... [2022-11-25 15:52:55,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16307c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:52:55, skipping insertion in model container [2022-11-25 15:52:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:52:54" (2/3) ... [2022-11-25 15:52:55,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16307c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:52:55, skipping insertion in model container [2022-11-25 15:52:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:52:55" (3/3) ... [2022-11-25 15:52:55,608 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2022-11-25 15:52:55,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:52:55,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:52:55,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:52:55,717 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;@c1ce4ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:52:55,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 15:52:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:55,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:52:55,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:55,731 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:55,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:55,738 INFO L85 PathProgramCache]: Analyzing trace with hash 310067850, now seen corresponding path program 1 times [2022-11-25 15:52:55,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:55,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717956109] [2022-11-25 15:52:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:55,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:55,757 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:55,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 15:52:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 15:52:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 15:52:56,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:56,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:56,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717956109] [2022-11-25 15:52:56,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717956109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:56,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:56,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:52:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093005142] [2022-11-25 15:52:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:56,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 15:52:56,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 15:52:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:52:56,103 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:52:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:56,132 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2022-11-25 15:52:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 15:52:56,134 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-25 15:52:56,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:56,142 INFO L225 Difference]: With dead ends: 51 [2022-11-25 15:52:56,142 INFO L226 Difference]: Without dead ends: 23 [2022-11-25 15:52:56,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 15:52:56,151 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:56,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:52:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-25 15:52:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-25 15:52:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-25 15:52:56,199 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 29 [2022-11-25 15:52:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:56,199 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-25 15:52:56,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 15:52:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-25 15:52:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 15:52:56,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:56,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:56,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:56,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:56,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1979244726, now seen corresponding path program 1 times [2022-11-25 15:52:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:56,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467158133] [2022-11-25 15:52:56,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:56,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:56,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:56,418 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:56,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 15:52:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:56,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:52:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:52:56,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:56,635 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:56,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467158133] [2022-11-25 15:52:56,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467158133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:56,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:56,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 15:52:56,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083940640] [2022-11-25 15:52:56,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:52:56,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:52:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:52:56,646 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:52:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:56,701 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-11-25 15:52:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:52:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-25 15:52:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:56,705 INFO L225 Difference]: With dead ends: 43 [2022-11-25 15:52:56,705 INFO L226 Difference]: Without dead ends: 25 [2022-11-25 15:52:56,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 15:52:56,709 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:56,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 15:52:56,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-25 15:52:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-25 15:52:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 15:52:56,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 29 [2022-11-25 15:52:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:56,724 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 15:52:56,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:52:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 15:52:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-25 15:52:56,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:56,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:56,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:56,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:56,927 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:56,928 INFO L85 PathProgramCache]: Analyzing trace with hash -789530644, now seen corresponding path program 1 times [2022-11-25 15:52:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872585185] [2022-11-25 15:52:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:56,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 15:52:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 15:52:57,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:52:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 15:52:57,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:57,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872585185] [2022-11-25 15:52:57,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872585185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:57,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:52:57,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 15:52:57,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400024786] [2022-11-25 15:52:57,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 15:52:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:57,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 15:52:57,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:52:57,257 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:52:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:57,353 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-25 15:52:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 15:52:57,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-11-25 15:52:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:57,355 INFO L225 Difference]: With dead ends: 45 [2022-11-25 15:52:57,355 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 15:52:57,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 15:52:57,357 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:57,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:52:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 15:52:57,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-11-25 15:52:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-11-25 15:52:57,363 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-11-25 15:52:57,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:57,364 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-11-25 15:52:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:52:57,364 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-11-25 15:52:57,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 15:52:57,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:57,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:57,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:57,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:57,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:57,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash 64401422, now seen corresponding path program 2 times [2022-11-25 15:52:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182723553] [2022-11-25 15:52:57,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:52:57,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:57,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:57,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 15:52:57,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 15:52:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:52:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:52:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:52:57,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 15:52:57,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:57,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182723553] [2022-11-25 15:52:57,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182723553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:52:57,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:52:57,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 15:52:57,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317475509] [2022-11-25 15:52:57,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:52:57,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 15:52:57,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:57,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 15:52:57,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:52:57,795 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:52:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:57,869 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-25 15:52:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 15:52:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-25 15:52:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:57,872 INFO L225 Difference]: With dead ends: 45 [2022-11-25 15:52:57,872 INFO L226 Difference]: Without dead ends: 28 [2022-11-25 15:52:57,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 15:52:57,874 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:57,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 15:52:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-25 15:52:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-25 15:52:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-25 15:52:57,880 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 33 [2022-11-25 15:52:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:57,881 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-25 15:52:57,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 15:52:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-25 15:52:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-25 15:52:57,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:57,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:57,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:58,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:58,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash 343299212, now seen corresponding path program 1 times [2022-11-25 15:52:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751385284] [2022-11-25 15:52:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:58,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:58,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:58,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:58,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 15:52:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 15:52:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 15:52:58,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 15:52:58,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:52:58,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751385284] [2022-11-25 15:52:58,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751385284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:58,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:52:58,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-25 15:52:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525524798] [2022-11-25 15:52:58,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:58,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 15:52:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:52:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 15:52:58,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 15:52:58,769 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:52:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:52:59,146 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-11-25 15:52:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 15:52:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-11-25 15:52:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:52:59,148 INFO L225 Difference]: With dead ends: 65 [2022-11-25 15:52:59,148 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 15:52:59,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2022-11-25 15:52:59,149 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:52:59,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:52:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 15:52:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-11-25 15:52:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:52:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-25 15:52:59,161 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 39 [2022-11-25 15:52:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:52:59,162 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-25 15:52:59,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:52:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-25 15:52:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 15:52:59,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:52:59,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:59,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:59,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:59,377 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:52:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:59,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1487527882, now seen corresponding path program 1 times [2022-11-25 15:52:59,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:52:59,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760697896] [2022-11-25 15:52:59,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:59,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:52:59,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:52:59,380 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:52:59,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 15:52:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 15:52:59,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:00,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:00,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2022-11-25 15:53:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:00,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:00,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2022-11-25 15:53:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:00,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:53:00,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:00,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 48 [2022-11-25 15:53:01,124 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:01,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 25 [2022-11-25 15:53:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 15:53:01,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:04,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-25 15:53:04,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:04,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 66 [2022-11-25 15:53:06,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 87 [2022-11-25 15:53:06,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:06,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 1 [2022-11-25 15:53:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:53:06,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760697896] [2022-11-25 15:53:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760697896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:06,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:06,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2022-11-25 15:53:06,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905205013] [2022-11-25 15:53:06,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:06,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-25 15:53:06,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-25 15:53:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-11-25 15:53:06,568 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:53:09,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:53:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:14,292 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-11-25 15:53:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 15:53:14,295 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-25 15:53:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:14,298 INFO L225 Difference]: With dead ends: 82 [2022-11-25 15:53:14,299 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 15:53:14,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 15:53:14,301 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:14,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 174 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 654 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2022-11-25 15:53:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 15:53:14,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2022-11-25 15:53:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-25 15:53:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2022-11-25 15:53:14,323 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 41 [2022-11-25 15:53:14,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:14,324 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2022-11-25 15:53:14,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 states have internal predecessors, (60), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:53:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2022-11-25 15:53:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 15:53:14,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:14,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:14,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:14,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:14,540 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:53:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 380877448, now seen corresponding path program 2 times [2022-11-25 15:53:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478848373] [2022-11-25 15:53:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:53:14,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:14,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 15:53:14,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:53:14,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 15:53:14,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 25 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:53:14,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:53:15,527 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:15,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478848373] [2022-11-25 15:53:15,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478848373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:15,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:15,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2022-11-25 15:53:15,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738967444] [2022-11-25 15:53:15,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 15:53:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 15:53:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:53:15,533 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:53:16,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:16,270 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2022-11-25 15:53:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 15:53:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-25 15:53:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:16,272 INFO L225 Difference]: With dead ends: 104 [2022-11-25 15:53:16,272 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 15:53:16,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:53:16,274 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 50 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:16,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 159 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:53:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 15:53:16,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 50. [2022-11-25 15:53:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:53:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-11-25 15:53:16,289 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2022-11-25 15:53:16,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:16,290 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-11-25 15:53:16,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:53:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-11-25 15:53:16,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 15:53:16,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:16,292 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:16,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-25 15:53:16,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:16,504 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:53:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:16,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1155110252, now seen corresponding path program 3 times [2022-11-25 15:53:16,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:16,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711453795] [2022-11-25 15:53:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:53:16,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:16,506 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:16,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 15:53:16,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:53:16,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:16,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 15:53:16,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:53:16,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:53:17,102 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:17,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711453795] [2022-11-25 15:53:17,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711453795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:17,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:17,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-11-25 15:53:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519701050] [2022-11-25 15:53:17,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 15:53:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 15:53:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 15:53:17,104 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:53:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:17,583 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-11-25 15:53:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:53:17,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-11-25 15:53:17,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:17,585 INFO L225 Difference]: With dead ends: 77 [2022-11-25 15:53:17,585 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 15:53:17,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-25 15:53:17,586 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:17,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 15:53:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 15:53:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-11-25 15:53:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:53:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-25 15:53:17,601 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2022-11-25 15:53:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:17,602 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-25 15:53:17,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 1 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-25 15:53:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-25 15:53:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-25 15:53:17,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:17,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:17,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:17,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:17,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:53:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:17,822 INFO L85 PathProgramCache]: Analyzing trace with hash -83406906, now seen corresponding path program 4 times [2022-11-25 15:53:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725662462] [2022-11-25 15:53:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:53:17,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:17,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:17,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 15:53:17,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:53:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 15:53:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-25 15:53:18,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 15:53:18,560 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:18,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725662462] [2022-11-25 15:53:18,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725662462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:18,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:18,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-25 15:53:18,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200112354] [2022-11-25 15:53:18,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 15:53:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 15:53:18,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-25 15:53:18,562 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:53:18,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:18,880 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-25 15:53:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:53:18,881 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2022-11-25 15:53:18,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:18,882 INFO L225 Difference]: With dead ends: 64 [2022-11-25 15:53:18,882 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 15:53:18,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-25 15:53:18,883 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:18,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 99 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 15:53:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 15:53:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-11-25 15:53:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:53:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-25 15:53:18,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 45 [2022-11-25 15:53:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:18,890 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-25 15:53:18,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:53:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-25 15:53:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-25 15:53:18,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:18,891 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:18,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:19,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:19,111 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:53:19,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1254464106, now seen corresponding path program 5 times [2022-11-25 15:53:19,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:19,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146780852] [2022-11-25 15:53:19,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 15:53:19,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:19,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:19,113 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:19,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 15:53:19,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-25 15:53:19,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 15:53:19,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 15:53:19,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 15:53:20,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:20,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146780852] [2022-11-25 15:53:20,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146780852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:20,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:20,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-25 15:53:20,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428513991] [2022-11-25 15:53:20,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:20,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 15:53:20,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:20,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 15:53:20,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-25 15:53:20,237 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 15:53:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:53:21,476 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2022-11-25 15:53:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 15:53:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 49 [2022-11-25 15:53:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:53:21,479 INFO L225 Difference]: With dead ends: 97 [2022-11-25 15:53:21,479 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 15:53:21,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:53:21,480 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:53:21,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 142 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:53:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 15:53:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2022-11-25 15:53:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-25 15:53:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2022-11-25 15:53:21,496 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 49 [2022-11-25 15:53:21,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:53:21,496 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2022-11-25 15:53:21,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 15:53:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2022-11-25 15:53:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 15:53:21,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:53:21,498 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:53:21,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 15:53:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:21,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:53:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:53:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash 715974184, now seen corresponding path program 6 times [2022-11-25 15:53:21,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:53:21,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773236563] [2022-11-25 15:53:21,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 15:53:21,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:53:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:53:21,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:53:21,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 15:53:21,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-25 15:53:21,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:53:21,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 15:53:21,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:53:22,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 15:53:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:22,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:22,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:22,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2022-11-25 15:53:23,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:53:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:23,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:53:23,448 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 15:53:23,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 86 treesize of output 74 [2022-11-25 15:53:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:23,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:23,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:23,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 51 [2022-11-25 15:53:24,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:24,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:53:24,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:53:24,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:24,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2022-11-25 15:53:24,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:24,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 34 [2022-11-25 15:53:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-25 15:53:24,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:53:57,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:53:57,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 378 treesize of output 230 [2022-11-25 15:53:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 6 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 15:53:58,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:53:58,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773236563] [2022-11-25 15:53:58,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773236563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:53:58,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:53:58,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 35] total 59 [2022-11-25 15:53:58,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769237906] [2022-11-25 15:53:58,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:53:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-25 15:53:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:53:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-25 15:53:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3078, Unknown=9, NotChecked=0, Total=3422 [2022-11-25 15:53:58,723 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:54:33,735 WARN L233 SmtUtils]: Spent 27.34s on a formula simplification. DAG size of input: 221 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:54:52,679 WARN L233 SmtUtils]: Spent 10.37s on a formula simplification. DAG size of input: 233 DAG size of output: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:55:11,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:55:13,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:55:15,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:55:31,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:55:33,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:55:35,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:56:18,636 WARN L233 SmtUtils]: Spent 13.93s on a formula simplification. DAG size of input: 228 DAG size of output: 184 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:56:53,747 WARN L233 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 225 DAG size of output: 181 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:06,967 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 90 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 15:57:10,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:57:12,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:57:14,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:57:16,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 15:58:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:58:46,997 INFO L93 Difference]: Finished difference Result 245 states and 303 transitions. [2022-11-25 15:58:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 15:58:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-11-25 15:58:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:58:47,005 INFO L225 Difference]: With dead ends: 245 [2022-11-25 15:58:47,005 INFO L226 Difference]: Without dead ends: 183 [2022-11-25 15:58:47,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 255.9s TimeCoverageRelationStatistics Valid=1635, Invalid=12870, Unknown=15, NotChecked=0, Total=14520 [2022-11-25 15:58:47,010 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 197 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 172 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:58:47,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 189 Invalid, 2375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2193 Invalid, 10 Unknown, 0 Unchecked, 65.6s Time] [2022-11-25 15:58:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-25 15:58:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 102. [2022-11-25 15:58:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 88 states have (on average 1.1363636363636365) internal successors, (100), 89 states have internal predecessors, (100), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (14), 9 states have call predecessors, (14), 10 states have call successors, (14) [2022-11-25 15:58:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2022-11-25 15:58:47,062 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 124 transitions. Word has length 51 [2022-11-25 15:58:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:58:47,063 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 124 transitions. [2022-11-25 15:58:47,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 52 states have internal predecessors, (74), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 15:58:47,063 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 124 transitions. [2022-11-25 15:58:47,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 15:58:47,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:58:47,065 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:58:47,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 15:58:47,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:47,278 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:58:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:58:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1840215844, now seen corresponding path program 7 times [2022-11-25 15:58:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:58:47,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243777503] [2022-11-25 15:58:47,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 15:58:47,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:47,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:58:47,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:58:47,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 15:58:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:58:47,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:58:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:58:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 44 proven. 13 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 15:58:47,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:58:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 15:58:48,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:58:48,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243777503] [2022-11-25 15:58:48,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243777503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:58:48,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:58:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-11-25 15:58:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599570497] [2022-11-25 15:58:48,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:58:48,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:58:48,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:58:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:58:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:58:48,711 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:58:49,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:58:49,962 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-25 15:58:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 15:58:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 55 [2022-11-25 15:58:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:58:49,965 INFO L225 Difference]: With dead ends: 115 [2022-11-25 15:58:49,965 INFO L226 Difference]: Without dead ends: 78 [2022-11-25 15:58:49,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-11-25 15:58:49,966 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 15:58:49,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 115 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 15:58:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-25 15:58:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-25 15:58:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-25 15:58:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2022-11-25 15:58:50,011 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 55 [2022-11-25 15:58:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:58:50,011 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2022-11-25 15:58:50,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 15:58:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2022-11-25 15:58:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 15:58:50,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:58:50,013 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:58:50,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 15:58:50,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:50,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:58:50,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:58:50,215 INFO L85 PathProgramCache]: Analyzing trace with hash -740392824, now seen corresponding path program 8 times [2022-11-25 15:58:50,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:58:50,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1011508379] [2022-11-25 15:58:50,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:58:50,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:58:50,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:58:50,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 15:58:50,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:58:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:58:50,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 15:58:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:58:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 15:58:50,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:58:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-25 15:58:51,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:58:51,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1011508379] [2022-11-25 15:58:51,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1011508379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:58:51,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:58:51,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-25 15:58:51,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32142400] [2022-11-25 15:58:51,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:58:51,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:58:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:58:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:58:51,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:58:51,915 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:58:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:58:52,931 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2022-11-25 15:58:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 15:58:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-25 15:58:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:58:52,933 INFO L225 Difference]: With dead ends: 109 [2022-11-25 15:58:52,933 INFO L226 Difference]: Without dead ends: 74 [2022-11-25 15:58:52,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2022-11-25 15:58:52,934 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 15:58:52,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 151 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 15:58:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-25 15:58:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 38. [2022-11-25 15:58:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 15:58:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-25 15:58:52,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 55 [2022-11-25 15:58:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:58:52,951 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-25 15:58:52,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 15:58:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-25 15:58:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 15:58:52,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:58:52,952 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:58:52,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 15:58:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:53,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:58:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:58:53,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2073903416, now seen corresponding path program 9 times [2022-11-25 15:58:53,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:58:53,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715925903] [2022-11-25 15:58:53,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:58:53,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:53,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:58:53,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:58:53,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 15:58:53,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 15:58:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:58:53,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:58:53,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:58:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 63 proven. 8 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-25 15:58:53,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:58:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-25 15:58:54,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 15:58:54,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715925903] [2022-11-25 15:58:54,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715925903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:58:54,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 15:58:54,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2022-11-25 15:58:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012079223] [2022-11-25 15:58:54,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 15:58:54,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 15:58:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 15:58:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 15:58:54,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-11-25 15:58:54,633 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 15:58:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 15:58:58,190 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2022-11-25 15:58:58,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 15:58:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2022-11-25 15:58:58,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 15:58:58,195 INFO L225 Difference]: With dead ends: 125 [2022-11-25 15:58:58,196 INFO L226 Difference]: Without dead ends: 100 [2022-11-25 15:58:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 15:58:58,197 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 115 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-25 15:58:58,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 148 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-25 15:58:58,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-25 15:58:58,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2022-11-25 15:58:58,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 83 states have internal predecessors, (93), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-25 15:58:58,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2022-11-25 15:58:58,232 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 59 [2022-11-25 15:58:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 15:58:58,233 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2022-11-25 15:58:58,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 15:58:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2022-11-25 15:58:58,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 15:58:58,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 15:58:58,234 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:58:58,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 15:58:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:58,435 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 15:58:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:58:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2140154630, now seen corresponding path program 10 times [2022-11-25 15:58:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 15:58:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824526269] [2022-11-25 15:58:58,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:58:58,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 15:58:58,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 15:58:58,437 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 15:58:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f890dcd-3cf3-41f3-9215-3248f7ce8104/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 15:58:59,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:58:59,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:58:59,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-25 15:58:59,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:58:59,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 15:59:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:00,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:00,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:00,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 49 [2022-11-25 15:59:01,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:59:01,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:59:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:01,616 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 15:59:01,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 89 [2022-11-25 15:59:02,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:59:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:59:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,143 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-25 15:59:02,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 89 [2022-11-25 15:59:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:02,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 66 [2022-11-25 15:59:02,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 15:59:02,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 15:59:02,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:02,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 78 [2022-11-25 15:59:04,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 15:59:04,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 43 [2022-11-25 15:59:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 15:59:04,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 16:00:32,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 537 treesize of output 473 [2022-11-25 16:00:32,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 16:00:32,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40558 treesize of output 27806