./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sqm-if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:37:05,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:37:05,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:37:05,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:37:05,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:37:05,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:37:05,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:37:05,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:37:05,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:37:05,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:37:05,872 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:37:05,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:37:05,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:37:05,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:37:05,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:37:05,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:37:05,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:37:05,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:37:05,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:37:05,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:37:05,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:37:05,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:37:05,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:37:05,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:37:05,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:37:05,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:37:05,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:37:05,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:37:05,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:37:05,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:37:05,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:37:05,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:37:05,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:37:05,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:37:05,887 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:37:05,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:37:05,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:37:05,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:37:05,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:37:05,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:37:05,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:37:05,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:37:05,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:37:05,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:37:05,903 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:37:05,903 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:37:05,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:37:05,913 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:37:05,913 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:37:05,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:37:05,913 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:37:05,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:37:05,914 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:37:05,915 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:37:05,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:37:05,915 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:37:05,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:37:05,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:37:05,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:37:05,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:37:05,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:37:05,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:37:05,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:37:05,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:37:05,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 [2022-12-14 14:37:06,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:37:06,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:37:06,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:37:06,109 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:37:06,109 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:37:06,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/sqm-if.c [2022-12-14 14:37:08,616 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:37:08,769 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:37:08,770 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c [2022-12-14 14:37:08,774 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/aa03a9ecb/62dbe301a61e468883cae04681f16510/FLAG0695a9973 [2022-12-14 14:37:09,195 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/aa03a9ecb/62dbe301a61e468883cae04681f16510 [2022-12-14 14:37:09,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:37:09,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:37:09,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:37:09,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:37:09,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:37:09,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6f9688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09, skipping insertion in model container [2022-12-14 14:37:09,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:37:09,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:37:09,319 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_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-12-14 14:37:09,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:37:09,339 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:37:09,347 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_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-12-14 14:37:09,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:37:09,361 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:37:09,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09 WrapperNode [2022-12-14 14:37:09,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:37:09,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:37:09,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:37:09,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:37:09,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,385 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-12-14 14:37:09,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:37:09,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:37:09,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:37:09,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:37:09,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,401 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:37:09,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:37:09,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:37:09,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:37:09,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (1/1) ... [2022-12-14 14:37:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:37:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:09,427 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:37:09,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:37:09,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:37:09,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:37:09,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 14:37:09,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 14:37:09,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:37:09,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:37:09,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 14:37:09,508 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:37:09,509 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:37:09,624 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:37:09,691 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:37:09,691 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 14:37:09,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:37:09 BoogieIcfgContainer [2022-12-14 14:37:09,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:37:09,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:37:09,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:37:09,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:37:09,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:37:09" (1/3) ... [2022-12-14 14:37:09,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b16f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:37:09, skipping insertion in model container [2022-12-14 14:37:09,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:37:09" (2/3) ... [2022-12-14 14:37:09,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b16f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:37:09, skipping insertion in model container [2022-12-14 14:37:09,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:37:09" (3/3) ... [2022-12-14 14:37:09,702 INFO L112 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2022-12-14 14:37:09,723 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:37:09,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:37:09,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:37:09,778 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=FINITE_AUTOMATA, 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;@16fb7954, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:37:09,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:37:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:09,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:37:09,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:09,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:09,788 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2022-12-14 14:37:09,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:09,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889084380] [2022-12-14 14:37:09,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:09,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:09,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:09,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889084380] [2022-12-14 14:37:09,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 14:37:09,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385573924] [2022-12-14 14:37:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:09,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:09,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:09,931 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:09,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:37:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:37:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:10,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:37:10,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385573924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:37:10,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:37:10,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:37:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813458749] [2022-12-14 14:37:10,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:37:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:37:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:37:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:37:10,115 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:10,157 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2022-12-14 14:37:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:37:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 14:37:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:10,164 INFO L225 Difference]: With dead ends: 20 [2022-12-14 14:37:10,164 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 14:37:10,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:37:10,169 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:10,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:37:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 14:37:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 14:37:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 14:37:10,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-12-14 14:37:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:10,196 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 14:37:10,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 14:37:10,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:37:10,197 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:10,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:10,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:37:10,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 14:37:10,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2022-12-14 14:37:10,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:10,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225808198] [2022-12-14 14:37:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:10,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:10,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655548141] [2022-12-14 14:37:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:10,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:10,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:10,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:10,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:37:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:10,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:37:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:10,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:37:10,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225808198] [2022-12-14 14:37:10,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:10,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655548141] [2022-12-14 14:37:10,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655548141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:37:10,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:37:10,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:37:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023309760] [2022-12-14 14:37:10,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:37:10,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:37:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:37:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:37:10,506 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:10,536 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 14:37:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:37:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 14:37:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:10,538 INFO L225 Difference]: With dead ends: 21 [2022-12-14 14:37:10,538 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 14:37:10,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:37:10,539 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:10,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:37:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 14:37:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2022-12-14 14:37:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 14:37:10,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-12-14 14:37:10,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:10,543 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 14:37:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:10,543 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 14:37:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 14:37:10,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:10,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:10,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:37:10,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 14:37:10,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2022-12-14 14:37:10,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315489396] [2022-12-14 14:37:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:10,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:10,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370833755] [2022-12-14 14:37:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:10,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:10,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:10,839 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:10,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:37:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 14:37:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:11,105 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 11 treesize of output 7 [2022-12-14 14:37:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:11,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:11,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:11,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 14:37:11,269 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:11,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:37:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:11,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315489396] [2022-12-14 14:37:11,286 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370833755] [2022-12-14 14:37:11,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370833755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271880781] [2022-12-14 14:37:11,300 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:11,300 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:11,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:11,307 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:11,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:11,425 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:11,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:11,544 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:11,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:11,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:11,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,736 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:11,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,799 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-12-14 14:37:11,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 113 treesize of output 63 [2022-12-14 14:37:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:11,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:11,973 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 11 treesize of output 7 [2022-12-14 14:37:11,991 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 11 treesize of output 7 [2022-12-14 14:37:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:12,098 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:12,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 200 [2022-12-14 14:37:12,143 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:37:12,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 154 [2022-12-14 14:37:12,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 137 treesize of output 62 [2022-12-14 14:37:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:12,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 38 [2022-12-14 14:37:12,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:12,192 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2022-12-14 14:37:12,222 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 11 treesize of output 7 [2022-12-14 14:37:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:12,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:12,246 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:12,246 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 91 treesize of output 94 [2022-12-14 14:37:12,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:12,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '202#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:12,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:12,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-12-14 14:37:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745489356] [2022-12-14 14:37:12,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:12,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:37:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:37:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:37:12,487 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:12,613 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-12-14 14:37:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:37:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 14:37:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:12,614 INFO L225 Difference]: With dead ends: 28 [2022-12-14 14:37:12,614 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 14:37:12,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:37:12,615 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:12,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 14:37:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 14. [2022-12-14 14:37:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-12-14 14:37:12,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2022-12-14 14:37:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:12,620 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-12-14 14:37:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-12-14 14:37:12,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 14:37:12,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:12,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:12,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 14:37:12,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:12,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:12,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1258946262, now seen corresponding path program 2 times [2022-12-14 14:37:12,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:12,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403444954] [2022-12-14 14:37:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:12,916 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020804424] [2022-12-14 14:37:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:37:12,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:12,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:12,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:12,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:37:13,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:37:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:37:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:13,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:13,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:13,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403444954] [2022-12-14 14:37:13,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020804424] [2022-12-14 14:37:13,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020804424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:13,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062355829] [2022-12-14 14:37:13,067 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:13,067 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:13,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:13,068 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:13,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:13,158 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:13,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:13,254 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:13,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:13,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:13,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,434 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:13,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,493 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 0 case distinctions, treesize of input 84 treesize of output 75 [2022-12-14 14:37:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:13,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2022-12-14 14:37:13,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:13,631 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 11 treesize of output 7 [2022-12-14 14:37:13,663 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 11 treesize of output 7 [2022-12-14 14:37:13,687 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 11 treesize of output 7 [2022-12-14 14:37:13,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:13,698 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:13,699 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 91 treesize of output 94 [2022-12-14 14:37:13,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:13,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:13,736 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:13,736 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 91 treesize of output 94 [2022-12-14 14:37:13,743 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 11 treesize of output 7 [2022-12-14 14:37:13,758 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:13,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '336#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:13,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:13,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:13,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-12-14 14:37:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071116284] [2022-12-14 14:37:13,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:37:13,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:37:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-14 14:37:13,999 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:14,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:14,071 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-14 14:37:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:37:14,071 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 14:37:14,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:14,072 INFO L225 Difference]: With dead ends: 35 [2022-12-14 14:37:14,072 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 14:37:14,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-14 14:37:14,073 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:14,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 13 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:37:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 14:37:14,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2022-12-14 14:37:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-12-14 14:37:14,076 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-12-14 14:37:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:14,077 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-12-14 14:37:14,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-12-14 14:37:14,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:37:14,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:14,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:14,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 14:37:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:14,279 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:14,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:14,281 INFO L85 PathProgramCache]: Analyzing trace with hash 2034389572, now seen corresponding path program 3 times [2022-12-14 14:37:14,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:14,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386043971] [2022-12-14 14:37:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:14,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:14,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393998425] [2022-12-14 14:37:14,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:37:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:14,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:37:14,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:37:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:14,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 14:37:14,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:14,537 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 11 treesize of output 7 [2022-12-14 14:37:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:14,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 14:37:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:14,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:14,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-12-14 14:37:14,781 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:14,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 14:37:14,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:14,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:37:14,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 [2022-12-14 14:37:14,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 28 [2022-12-14 14:37:14,810 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 8 treesize of output 4 [2022-12-14 14:37:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:37:14,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386043971] [2022-12-14 14:37:14,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393998425] [2022-12-14 14:37:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393998425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [190912549] [2022-12-14 14:37:14,821 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:14,821 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:14,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:14,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:14,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:14,921 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:14,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:15,013 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:15,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:15,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:15,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,166 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:15,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,220 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-12-14 14:37:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 113 treesize of output 63 [2022-12-14 14:37:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:15,342 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 11 treesize of output 7 [2022-12-14 14:37:15,353 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 11 treesize of output 7 [2022-12-14 14:37:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:15,424 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:15,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 200 [2022-12-14 14:37:15,452 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:37:15,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 156 [2022-12-14 14:37:15,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 139 treesize of output 89 [2022-12-14 14:37:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:15,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 64 [2022-12-14 14:37:15,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:15,499 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 146 treesize of output 123 [2022-12-14 14:37:15,523 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 11 treesize of output 7 [2022-12-14 14:37:15,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:15,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:15,542 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:15,543 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 91 treesize of output 94 [2022-12-14 14:37:15,554 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:15,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '488#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:15,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:15,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:15,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-12-14 14:37:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616282456] [2022-12-14 14:37:15,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:15,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 14:37:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:15,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 14:37:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-14 14:37:15,756 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:16,002 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-12-14 14:37:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 14:37:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 14:37:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:16,004 INFO L225 Difference]: With dead ends: 40 [2022-12-14 14:37:16,004 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 14:37:16,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-12-14 14:37:16,005 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:16,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 30 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 14:37:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 17. [2022-12-14 14:37:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 14:37:16,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2022-12-14 14:37:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:16,010 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 14:37:16,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 14:37:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 14:37:16,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:16,011 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:16,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:37:16,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:16,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:16,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1186125732, now seen corresponding path program 4 times [2022-12-14 14:37:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:16,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741583241] [2022-12-14 14:37:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:16,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:16,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469190749] [2022-12-14 14:37:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:37:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:16,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:16,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:37:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:37:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:16,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:16,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741583241] [2022-12-14 14:37:16,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469190749] [2022-12-14 14:37:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469190749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768384902] [2022-12-14 14:37:16,395 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:16,395 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:16,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:16,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:16,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:16,484 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:16,566 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:16,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:16,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,738 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:16,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:16,801 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 14:37:16,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 453 treesize of output 440 [2022-12-14 14:37:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 113 treesize of output 63 [2022-12-14 14:37:16,909 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 11 treesize of output 7 [2022-12-14 14:37:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:16,942 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 11 treesize of output 7 [2022-12-14 14:37:16,966 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 11 treesize of output 7 [2022-12-14 14:37:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:16,978 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:16,978 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 91 treesize of output 94 [2022-12-14 14:37:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:17,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:17,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:17,014 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:17,014 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 91 treesize of output 94 [2022-12-14 14:37:17,020 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 11 treesize of output 7 [2022-12-14 14:37:17,031 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:17,210 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '673#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:17,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:17,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:17,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-12-14 14:37:17,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782641064] [2022-12-14 14:37:17,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 14:37:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:17,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 14:37:17,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:37:17,212 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:17,320 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-12-14 14:37:17,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:37:17,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 14:37:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:17,321 INFO L225 Difference]: With dead ends: 54 [2022-12-14 14:37:17,321 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 14:37:17,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:37:17,322 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:17,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 33 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 14:37:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2022-12-14 14:37:17,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-12-14 14:37:17,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2022-12-14 14:37:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:17,334 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-12-14 14:37:17,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-12-14 14:37:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 14:37:17,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:17,334 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:17,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:37:17,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:17,536 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash 221349744, now seen corresponding path program 1 times [2022-12-14 14:37:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:17,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254067415] [2022-12-14 14:37:17,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:17,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:17,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412295156] [2022-12-14 14:37:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:17,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:17,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:17,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:37:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:17,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 14:37:17,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:17,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-12-14 14:37:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 14:37:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:17,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 14:37:17,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 14:37:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:17,811 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 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 14:37:17,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2022-12-14 14:37:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:17,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:18,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 14:37:20,453 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8)) (.cse1 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (let ((.cse2 (+ (* (mod .cse1 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (= |c_ULTIMATE.start_main_~i~0#1| 0))) (and (or .cse0 (and (not (= .cse1 0)) (forall ((v_ArrVal_250 (Array Int Int))) (= (select (store v_ArrVal_250 .cse2 (+ (select v_ArrVal_250 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_250) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4) 2)) .cse5) 4)))) (or (= (select (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| 1))) (store .cse6 .cse2 (+ 2 (select .cse6 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4)))) .cse5) 4) (not .cse0))))) is different from false [2022-12-14 14:37:20,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:20,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-12-14 14:37:20,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:20,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:37:20,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:20,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2022-12-14 14:37:20,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:20,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 66 treesize of output 70 [2022-12-14 14:37:20,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 62 treesize of output 56 [2022-12-14 14:37:20,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 4 [2022-12-14 14:37:20,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 43 treesize of output 39 [2022-12-14 14:37:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 14:37:20,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254067415] [2022-12-14 14:37:20,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412295156] [2022-12-14 14:37:20,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412295156] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:20,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1751483285] [2022-12-14 14:37:20,888 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:37:20,888 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:20,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:20,888 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:20,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:21,029 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:21,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:21,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 14:37:21,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:21,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:21,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,201 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:21,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:21,293 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 14:37:21,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 401 treesize of output 384 [2022-12-14 14:37:21,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:21,318 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 61 treesize of output 63 [2022-12-14 14:37:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:21,416 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 11 treesize of output 7 [2022-12-14 14:37:21,431 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 11 treesize of output 7 [2022-12-14 14:37:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:21,518 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:21,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 197 [2022-12-14 14:37:21,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 73 treesize of output 61 [2022-12-14 14:37:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:21,542 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2022-12-14 14:37:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:21,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:21,587 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:21,587 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 91 treesize of output 94 [2022-12-14 14:37:21,595 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 11 treesize of output 7 [2022-12-14 14:37:21,694 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:22,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '902#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:22,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:22,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:22,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-12-14 14:37:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782521352] [2022-12-14 14:37:22,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:22,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 14:37:22,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 14:37:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=520, Unknown=1, NotChecked=46, Total=650 [2022-12-14 14:37:22,319 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:24,799 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2022-12-14 14:37:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 14:37:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 14:37:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:24,800 INFO L225 Difference]: With dead ends: 99 [2022-12-14 14:37:24,800 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 14:37:24,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=377, Invalid=1882, Unknown=1, NotChecked=92, Total=2352 [2022-12-14 14:37:24,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:24,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 92 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 223 Invalid, 0 Unknown, 36 Unchecked, 0.6s Time] [2022-12-14 14:37:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 14:37:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 34. [2022-12-14 14:37:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:24,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-12-14 14:37:24,812 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 14 [2022-12-14 14:37:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:24,812 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-12-14 14:37:24,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-12-14 14:37:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 14:37:24,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:24,813 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:24,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:37:25,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 14:37:25,015 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash -211311242, now seen corresponding path program 5 times [2022-12-14 14:37:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385734487] [2022-12-14 14:37:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:25,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799187897] [2022-12-14 14:37:25,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:37:25,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:25,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:25,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:37:25,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:37:25,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:37:25,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:25,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:25,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385734487] [2022-12-14 14:37:25,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799187897] [2022-12-14 14:37:25,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799187897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560708578] [2022-12-14 14:37:25,382 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:25,382 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:25,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:25,383 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:25,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:25,508 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:25,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:25,630 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:25,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:25,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:25,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,775 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:25,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,822 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-12-14 14:37:25,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 113 treesize of output 63 [2022-12-14 14:37:25,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:25,933 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 11 treesize of output 7 [2022-12-14 14:37:25,948 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 11 treesize of output 7 [2022-12-14 14:37:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:25,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:26,036 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:26,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 197 [2022-12-14 14:37:26,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 91 [2022-12-14 14:37:26,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:26,080 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 91 treesize of output 93 [2022-12-14 14:37:26,110 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 11 treesize of output 7 [2022-12-14 14:37:26,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:26,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:26,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:26,129 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:26,129 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 91 treesize of output 94 [2022-12-14 14:37:26,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:26,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1239#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:26,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:26,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:26,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-12-14 14:37:26,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793304610] [2022-12-14 14:37:26,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:26,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 14:37:26,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 14:37:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:37:26,447 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:26,682 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2022-12-14 14:37:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:37:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 14:37:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:26,684 INFO L225 Difference]: With dead ends: 79 [2022-12-14 14:37:26,684 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 14:37:26,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-12-14 14:37:26,685 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 91 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:26,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 46 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 14:37:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2022-12-14 14:37:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-12-14 14:37:26,693 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 14 [2022-12-14 14:37:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:26,693 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-12-14 14:37:26,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:26,693 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-12-14 14:37:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 14:37:26,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:26,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:26,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:37:26,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:26,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:26,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash -582184476, now seen corresponding path program 6 times [2022-12-14 14:37:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:26,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209253578] [2022-12-14 14:37:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:26,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:26,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:26,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772582223] [2022-12-14 14:37:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:37:26,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:26,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:26,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:37:27,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:37:27,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 14:37:27,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:27,490 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 11 treesize of output 7 [2022-12-14 14:37:27,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 58 [2022-12-14 14:37:27,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:27,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-12-14 14:37:27,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 58 [2022-12-14 14:37:27,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:27,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:27,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-12-14 14:37:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:27,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 14:37:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:37:27,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:27,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-12-14 14:37:27,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 30 treesize of output 28 [2022-12-14 14:37:28,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 80 treesize of output 78 [2022-12-14 14:37:28,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:28,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 51 [2022-12-14 14:37:28,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:28,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:37:28,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 38 [2022-12-14 14:37:28,483 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 8 treesize of output 4 [2022-12-14 14:37:28,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3210 treesize of output 3178 [2022-12-14 14:37:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:37:28,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209253578] [2022-12-14 14:37:28,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772582223] [2022-12-14 14:37:28,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772582223] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:28,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315187675] [2022-12-14 14:37:28,771 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 14:37:28,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:28,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:28,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:28,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:28,909 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:28,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:29,038 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:29,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:29,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:29,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,211 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:29,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:29,290 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-12-14 14:37:29,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 453 treesize of output 438 [2022-12-14 14:37:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 111 treesize of output 36 [2022-12-14 14:37:29,397 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 11 treesize of output 7 [2022-12-14 14:37:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:29,421 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 11 treesize of output 7 [2022-12-14 14:37:29,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:29,515 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:29,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 200 [2022-12-14 14:37:29,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 91 [2022-12-14 14:37:29,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:29,554 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 91 treesize of output 93 [2022-12-14 14:37:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:29,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:29,607 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:29,608 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 91 treesize of output 94 [2022-12-14 14:37:29,616 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 11 treesize of output 7 [2022-12-14 14:37:29,630 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:29,976 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1524#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= |ULTIMATE.start_main_#t~mem13#1| (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))) 8)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) (* 2 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:29,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:29,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:29,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2022-12-14 14:37:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444816625] [2022-12-14 14:37:29,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 14:37:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 14:37:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-12-14 14:37:29,978 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:31,017 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-12-14 14:37:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 14:37:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 14:37:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:31,018 INFO L225 Difference]: With dead ends: 98 [2022-12-14 14:37:31,018 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 14:37:31,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 14:37:31,020 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 116 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:37:31,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 14:37:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 40. [2022-12-14 14:37:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-12-14 14:37:31,032 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 15 [2022-12-14 14:37:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:31,032 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-12-14 14:37:31,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-12-14 14:37:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 14:37:31,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:31,033 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:31,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 14:37:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:31,235 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:31,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1238308144, now seen corresponding path program 2 times [2022-12-14 14:37:31,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:31,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653741370] [2022-12-14 14:37:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:31,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:31,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:31,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390958781] [2022-12-14 14:37:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:37:31,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:31,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:31,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:37:31,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:37:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:37:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:37:31,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:37:31,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653741370] [2022-12-14 14:37:31,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390958781] [2022-12-14 14:37:31,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390958781] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:31,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518837994] [2022-12-14 14:37:31,579 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:37:31,579 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:31,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:31,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:31,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:31,702 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:31,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:31,825 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:31,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:31,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:31,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:31,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:31,990 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:31,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:32,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 82 [2022-12-14 14:37:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:32,122 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 36 [2022-12-14 14:37:32,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:32,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:32,170 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 11 treesize of output 7 [2022-12-14 14:37:32,182 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 11 treesize of output 7 [2022-12-14 14:37:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:32,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:32,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:32,284 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 197 [2022-12-14 14:37:32,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 103 treesize of output 91 [2022-12-14 14:37:32,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:32,326 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 91 treesize of output 93 [2022-12-14 14:37:32,350 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 11 treesize of output 7 [2022-12-14 14:37:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:32,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:32,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:32,369 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:32,369 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 91 treesize of output 94 [2022-12-14 14:37:32,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:32,829 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1863#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:32,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:32,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:32,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-12-14 14:37:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345323853] [2022-12-14 14:37:32,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:32,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 14:37:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 14:37:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:37:32,831 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:33,052 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2022-12-14 14:37:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:37:33,052 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 14:37:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:33,053 INFO L225 Difference]: With dead ends: 62 [2022-12-14 14:37:33,053 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 14:37:33,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-12-14 14:37:33,053 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:33,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 30 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:37:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 14:37:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-12-14 14:37:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-12-14 14:37:33,062 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 16 [2022-12-14 14:37:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:33,062 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-12-14 14:37:33,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:33,062 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-12-14 14:37:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 14:37:33,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:33,062 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:33,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 14:37:33,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:33,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1309620645, now seen corresponding path program 3 times [2022-12-14 14:37:33,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:33,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255958517] [2022-12-14 14:37:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:33,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:33,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901603673] [2022-12-14 14:37:33,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:37:33,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:33,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:33,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:37:33,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:37:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:37:33,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:37:33,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:37:33,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:37:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255958517] [2022-12-14 14:37:33,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:37:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901603673] [2022-12-14 14:37:33,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901603673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:33,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842527394] [2022-12-14 14:37:33,517 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:37:33,517 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:37:33,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:37:33,517 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:37:33,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:37:33,631 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-12-14 14:37:33,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-12-14 14:37:33,748 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:37:33,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:37:33,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:37:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,898 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:37:33,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:37:33,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,942 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 0 case distinctions, treesize of input 136 treesize of output 125 [2022-12-14 14:37:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:33,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 111 treesize of output 36 [2022-12-14 14:37:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:37:34,052 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 11 treesize of output 7 [2022-12-14 14:37:34,064 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 11 treesize of output 7 [2022-12-14 14:37:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:34,171 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:37:34,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 200 [2022-12-14 14:37:34,224 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:37:34,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 154 [2022-12-14 14:37:34,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 137 treesize of output 62 [2022-12-14 14:37:34,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:34,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 38 [2022-12-14 14:37:34,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:34,273 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 61 treesize of output 63 [2022-12-14 14:37:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:34,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:37:34,310 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:37:34,311 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 91 treesize of output 94 [2022-12-14 14:37:34,318 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 11 treesize of output 7 [2022-12-14 14:37:34,405 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:37:34,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2148#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:37:34,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:37:34,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:37:34,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-12-14 14:37:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818568749] [2022-12-14 14:37:34,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:34,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 14:37:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:37:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 14:37:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:37:34,902 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:35,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:35,344 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-12-14 14:37:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 14:37:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 14:37:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:35,345 INFO L225 Difference]: With dead ends: 67 [2022-12-14 14:37:35,345 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 14:37:35,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2022-12-14 14:37:35,346 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:35,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 73 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:37:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 14:37:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-12-14 14:37:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-12-14 14:37:35,353 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 17 [2022-12-14 14:37:35,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:35,353 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-12-14 14:37:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:37:35,354 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-12-14 14:37:35,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 14:37:35,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:35,354 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:37:35,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:37:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:37:35,555 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:37:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -774659120, now seen corresponding path program 4 times [2022-12-14 14:37:35,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:37:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47075862] [2022-12-14 14:37:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:37:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:37:35,576 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:37:35,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827707002] [2022-12-14 14:37:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 14:37:35,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:35,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:35,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:35,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:37:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:37:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 14:37:36,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:36,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-12-14 14:37:36,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 14:37:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 14:37:36,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 58 [2022-12-14 14:37:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 116 [2022-12-14 14:37:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 26 [2022-12-14 14:37:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 14:37:36,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-12-14 14:37:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,321 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 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 14:37:36,375 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 0 case distinctions, treesize of input 100 treesize of output 88 [2022-12-14 14:37:36,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 145 [2022-12-14 14:37:36,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 40 [2022-12-14 14:37:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:37:36,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 47 [2022-12-14 14:37:36,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 28 [2022-12-14 14:37:36,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:36,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:36,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 7 treesize of output 3 [2022-12-14 14:37:37,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 28 [2022-12-14 14:37:37,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 78 [2022-12-14 14:37:38,244 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse8 (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (.cse9 (* (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296) 8))) (let ((.cse0 (= |c_ULTIMATE.start_main_~i~0#1| 0)) (.cse2 (+ (* (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296) 8) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (+ .cse9 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse3 (+ .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ (* 8 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* (mod .cse8 4294967296) 8))) (.cse7 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (or (not .cse0) (forall ((v_ArrVal_629 Int) (v_ArrVal_624 Int)) (= (select (store (store (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| 1))) (store .cse1 .cse2 (+ 2 (select .cse1 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4)))) .cse5 v_ArrVal_624) .cse6 v_ArrVal_629) .cse7) 4))) (or .cse0 (and (not (= .cse8 0)) (forall ((v_ArrVal_629 Int) (v_ArrVal_624 Int) (v_ArrVal_620 (Array Int Int))) (= (select (store (store (store v_ArrVal_620 .cse2 (+ 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_620) |c_ULTIMATE.start_main_~b~0#1.base|) .cse4) (select v_ArrVal_620 .cse3))) .cse5 v_ArrVal_624) .cse6 v_ArrVal_629) .cse7) 4))))))) is different from false [2022-12-14 14:37:38,647 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:38,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2022-12-14 14:37:39,235 INFO L321 Elim1Store]: treesize reduction 47, result has 38.2 percent of original size [2022-12-14 14:37:39,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 50 [2022-12-14 14:37:39,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:39,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-12-14 14:37:40,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:37:40,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:37:40,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 4899 treesize of output 4858 [2022-12-14 14:37:40,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1973 treesize of output 1941 [2022-12-14 14:38:12,864 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 8 treesize of output 4 [2022-12-14 14:38:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-12-14 14:38:12,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:38:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47075862] [2022-12-14 14:38:12,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:38:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827707002] [2022-12-14 14:38:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827707002] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:38:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1285481420] [2022-12-14 14:38:12,917 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:38:12,917 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:38:12,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:38:12,917 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:38:12,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:38:13,043 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:38:13,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:38:13,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 14:38:13,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:38:13,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:13,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,217 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:38:13,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:38:13,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,261 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 0 case distinctions, treesize of input 84 treesize of output 75 [2022-12-14 14:38:13,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:13,271 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 34 [2022-12-14 14:38:13,366 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 11 treesize of output 7 [2022-12-14 14:38:13,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:38:13,408 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 11 treesize of output 7 [2022-12-14 14:38:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:13,439 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:38:13,439 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 91 treesize of output 94 [2022-12-14 14:38:13,447 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 11 treesize of output 7 [2022-12-14 14:38:13,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:13,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:13,480 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:38:13,481 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 91 treesize of output 94 [2022-12-14 14:38:13,488 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 11 treesize of output 7 [2022-12-14 14:38:13,585 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:38:14,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2457#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:38:14,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:38:14,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:38:14,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-12-14 14:38:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885198587] [2022-12-14 14:38:14,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:38:14,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 14:38:14,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:38:14,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 14:38:14,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=868, Unknown=1, NotChecked=60, Total=1056 [2022-12-14 14:38:14,096 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:38:25,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:38:25,170 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2022-12-14 14:38:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 14:38:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 14:38:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:38:25,171 INFO L225 Difference]: With dead ends: 170 [2022-12-14 14:38:25,171 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 14:38:25,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=972, Invalid=4883, Unknown=1, NotChecked=150, Total=6006 [2022-12-14 14:38:25,172 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 369 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:25,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 179 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 365 Invalid, 0 Unknown, 58 Unchecked, 2.0s Time] [2022-12-14 14:38:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 14:38:25,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 53. [2022-12-14 14:38:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 52 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:38:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-12-14 14:38:25,190 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 18 [2022-12-14 14:38:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:38:25,190 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-12-14 14:38:25,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:38:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-12-14 14:38:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 14:38:25,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:38:25,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 14:38:25,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 14:38:25,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:38:25,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:38:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:38:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -972050403, now seen corresponding path program 5 times [2022-12-14 14:38:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:38:25,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199018370] [2022-12-14 14:38:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:38:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:38:25,440 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 14:38:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941790969] [2022-12-14 14:38:25,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:38:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:38:25,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:38:25,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:38:25,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:38:25,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:38:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:38:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-14 14:38:25,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:38:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-12-14 14:38:26,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 14:38:26,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 107 [2022-12-14 14:38:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:26,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 188 [2022-12-14 14:38:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-12-14 14:38:26,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,334 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 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 14:38:26,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,404 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 0 case distinctions, treesize of input 48 treesize of output 45 [2022-12-14 14:38:26,516 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-12-14 14:38:26,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 155 [2022-12-14 14:38:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 227 [2022-12-14 14:38:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:26,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 108 [2022-12-14 14:38:26,992 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-12-14 14:38:26,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 41 [2022-12-14 14:38:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:27,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:38:41,039 WARN L233 SmtUtils]: Spent 12.17s on a formula simplification. DAG size of input: 72 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:38:42,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:38:42,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 47 [2022-12-14 14:38:42,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:38:42,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2022-12-14 14:38:42,693 INFO L321 Elim1Store]: treesize reduction 223, result has 17.4 percent of original size [2022-12-14 14:38:42,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 267 treesize of output 119 [2022-12-14 14:38:42,703 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 234 treesize of output 224 [2022-12-14 14:38:42,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 370 treesize of output 336 [2022-12-14 14:38:42,844 INFO L321 Elim1Store]: treesize reduction 62, result has 12.7 percent of original size [2022-12-14 14:38:42,844 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 732 treesize of output 628 [2022-12-14 14:38:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:38:43,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:38:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199018370] [2022-12-14 14:38:43,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 14:38:43,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941790969] [2022-12-14 14:38:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941790969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:38:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872772390] [2022-12-14 14:38:43,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 14:38:43,050 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:38:43,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:38:43,050 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:38:43,050 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:38:43,401 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-12-14 14:38:43,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-12-14 14:38:43,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-12-14 14:38:43,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 14:38:43,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,663 INFO L321 Elim1Store]: treesize reduction 315, result has 10.8 percent of original size [2022-12-14 14:38:43,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 412 treesize of output 452 [2022-12-14 14:38:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,716 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 0 case distinctions, treesize of input 136 treesize of output 127 [2022-12-14 14:38:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 113 treesize of output 63 [2022-12-14 14:38:43,838 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 11 treesize of output 7 [2022-12-14 14:38:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 63 [2022-12-14 14:38:43,869 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 11 treesize of output 7 [2022-12-14 14:38:43,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:43,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:44,013 INFO L321 Elim1Store]: treesize reduction 345, result has 8.0 percent of original size [2022-12-14 14:38:44,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 200 [2022-12-14 14:38:44,136 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 14:38:44,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 153 treesize of output 156 [2022-12-14 14:38:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:44,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 139 treesize of output 89 [2022-12-14 14:38:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:44,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:44,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 64 [2022-12-14 14:38:44,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:44,211 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 94 [2022-12-14 14:38:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:44,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:38:44,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 14:38:44,269 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 14:38:44,269 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 91 treesize of output 94 [2022-12-14 14:38:44,285 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 11 treesize of output 7 [2022-12-14 14:38:44,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:38:46,667 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3011#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 14:38:46,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:38:46,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:38:46,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-12-14 14:38:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564110143] [2022-12-14 14:38:46,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 14:38:46,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 14:38:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:38:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 14:38:46,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 14:38:46,669 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:38:55,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 14:38:55,006 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 14:38:55,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:38:55,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 14:38:55,008 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:38:55,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 14:38:55,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 14:38:55,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:38:55,210 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:898) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:772) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:346) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 48 more [2022-12-14 14:38:55,219 INFO L158 Benchmark]: Toolchain (without parser) took 106019.65ms. Allocated memory was 123.7MB in the beginning and 408.9MB in the end (delta: 285.2MB). Free memory was 89.7MB in the beginning and 267.9MB in the end (delta: -178.2MB). Peak memory consumption was 110.2MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,219 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:38:55,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.40ms. Allocated memory is still 123.7MB. Free memory was 89.3MB in the beginning and 78.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.36ms. Allocated memory is still 123.7MB. Free memory was 78.6MB in the beginning and 76.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,220 INFO L158 Benchmark]: Boogie Preprocessor took 17.29ms. Allocated memory is still 123.7MB. Free memory was 76.9MB in the beginning and 75.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,220 INFO L158 Benchmark]: RCFGBuilder took 289.95ms. Allocated memory is still 123.7MB. Free memory was 75.6MB in the beginning and 59.7MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,220 INFO L158 Benchmark]: TraceAbstraction took 105522.17ms. Allocated memory was 123.7MB in the beginning and 408.9MB in the end (delta: 285.2MB). Free memory was 58.9MB in the beginning and 267.9MB in the end (delta: -209.0MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. [2022-12-14 14:38:55,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.40ms. Allocated memory is still 123.7MB. Free memory was 89.3MB in the beginning and 78.6MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.36ms. Allocated memory is still 123.7MB. Free memory was 78.6MB in the beginning and 76.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.29ms. Allocated memory is still 123.7MB. Free memory was 76.9MB in the beginning and 75.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 289.95ms. Allocated memory is still 123.7MB. Free memory was 75.6MB in the beginning and 59.7MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 105522.17ms. Allocated memory was 123.7MB in the beginning and 408.9MB in the end (delta: 285.2MB). Free memory was 58.9MB in the beginning and 267.9MB in the end (delta: -209.0MB). Peak memory consumption was 78.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sqm-if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:38:56,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:38:56,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:38:56,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:38:56,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:38:56,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:38:56,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:38:56,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:38:56,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:38:56,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:38:56,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:38:56,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:38:56,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:38:56,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:38:56,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:38:56,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:38:56,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:38:56,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:38:56,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:38:56,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:38:56,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:38:56,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:38:56,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:38:56,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:38:56,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:38:56,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:38:56,573 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:38:56,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:38:56,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:38:56,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:38:56,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:38:56,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:38:56,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:38:56,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:38:56,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:38:56,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:38:56,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:38:56,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:38:56,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:38:56,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:38:56,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:38:56,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 14:38:56,606 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:38:56,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:38:56,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:38:56,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:38:56,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:38:56,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:38:56,607 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:38:56,608 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:38:56,608 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:38:56,608 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:38:56,608 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:38:56,608 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:38:56,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:38:56,609 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:38:56,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:38:56,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:38:56,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:38:56,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:38:56,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:38:56,611 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:38:56,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:38:56,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:38:56,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 14:38:56,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:38:56,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:38:56,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:38:56,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:38:56,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:38:56,613 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 14:38:56,614 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 14:38:56,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:38:56,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:38:56,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 14:38:56,614 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec5a38bdcfa55d3eade09a482c32f3a3863eaa8e13e2a337e00dc10a9c55f830 [2022-12-14 14:38:56,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:38:56,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:38:56,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:38:56,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:38:56,854 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:38:56,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-fpi/sqm-if.c [2022-12-14 14:38:59,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:38:59,567 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:38:59,567 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c [2022-12-14 14:38:59,572 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/472c36ad8/f8783f22d8c7497b9e96930fa5ed7e07/FLAG57c6c70ad [2022-12-14 14:38:59,583 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/data/472c36ad8/f8783f22d8c7497b9e96930fa5ed7e07 [2022-12-14 14:38:59,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:38:59,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:38:59,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:38:59,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:38:59,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:38:59,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7547db6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59, skipping insertion in model container [2022-12-14 14:38:59,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:38:59,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:38:59,723 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_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-12-14 14:38:59,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:38:59,749 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:38:59,758 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_0c4c7568-a64f-4810-92bf-66553b7f821e/sv-benchmarks/c/array-fpi/sqm-if.c[589,602] [2022-12-14 14:38:59,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:38:59,774 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:38:59,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59 WrapperNode [2022-12-14 14:38:59,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:38:59,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:38:59,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:38:59,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:38:59,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,788 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,801 INFO L138 Inliner]: procedures = 18, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-12-14 14:38:59,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:38:59,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:38:59,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:38:59,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:38:59,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:38:59,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:38:59,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:38:59,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:38:59,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (1/1) ... [2022-12-14 14:38:59,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:38:59,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:38:59,846 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:38:59,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:38:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:38:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 14:38:59,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-12-14 14:38:59,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 14:38:59,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:38:59,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:38:59,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-12-14 14:38:59,949 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:38:59,950 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:39:00,152 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:39:00,157 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:39:00,158 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 14:39:00,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:39:00 BoogieIcfgContainer [2022-12-14 14:39:00,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:39:00,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:39:00,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:39:00,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:39:00,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:38:59" (1/3) ... [2022-12-14 14:39:00,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad00215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:39:00, skipping insertion in model container [2022-12-14 14:39:00,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:38:59" (2/3) ... [2022-12-14 14:39:00,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad00215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:39:00, skipping insertion in model container [2022-12-14 14:39:00,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:39:00" (3/3) ... [2022-12-14 14:39:00,168 INFO L112 eAbstractionObserver]: Analyzing ICFG sqm-if.c [2022-12-14 14:39:00,186 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:39:00,186 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 14:39:00,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:39:00,239 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=FINITE_AUTOMATA, 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;@3c12ac7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:39:00,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 14:39:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:39:00,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:00,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:00,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:00,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2022-12-14 14:39:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:00,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132127151] [2022-12-14 14:39:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:00,267 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 [2022-12-14 14:39:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:00,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:00,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 14:39:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:00,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:00,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:00,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132127151] [2022-12-14 14:39:00,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132127151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:00,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:39:00,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:39:00,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002736239] [2022-12-14 14:39:00,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:00,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:39:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:00,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:39:00,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:39:00,433 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:00,449 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-12-14 14:39:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:39:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 14:39:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:00,458 INFO L225 Difference]: With dead ends: 42 [2022-12-14 14:39:00,458 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 14:39:00,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:39:00,464 INFO L413 NwaCegarLoop]: 28 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, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:00,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:39:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 14:39:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 14:39:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-14 14:39:00,488 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2022-12-14 14:39:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-14 14:39:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-14 14:39:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:39:00,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:00,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:00,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:00,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:00,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2022-12-14 14:39:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:00,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778810291] [2022-12-14 14:39:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:00,697 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 [2022-12-14 14:39:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:00,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:00,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:00,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:39:00,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:00,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:00,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:00,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778810291] [2022-12-14 14:39:00,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778810291] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:00,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:39:00,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 14:39:00,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146270535] [2022-12-14 14:39:00,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:39:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:39:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:39:00,985 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:01,197 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-12-14 14:39:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:39:01,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 14:39:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:01,206 INFO L225 Difference]: With dead ends: 45 [2022-12-14 14:39:01,206 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 14:39:01,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:39:01,208 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:01,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 15 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:39:01,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 14:39:01,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2022-12-14 14:39:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:01,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-12-14 14:39:01,214 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-12-14 14:39:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:01,214 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-12-14 14:39:01,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-12-14 14:39:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 14:39:01,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:01,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:01,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 14:39:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:01,417 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2022-12-14 14:39:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:01,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030192817] [2022-12-14 14:39:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:01,422 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 [2022-12-14 14:39:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:01,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:01,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:39:01,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:01,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:01,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:39:01,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:01,807 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 53 treesize of output 29 [2022-12-14 14:39:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:39:01,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:01,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:01,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030192817] [2022-12-14 14:39:01,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030192817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:01,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:39:01,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:39:01,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99379173] [2022-12-14 14:39:01,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:39:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:39:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:39:01,829 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:02,063 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 14:39:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:39:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 14:39:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:02,064 INFO L225 Difference]: With dead ends: 40 [2022-12-14 14:39:02,065 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 14:39:02,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:39:02,066 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:02,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:39:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 14:39:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-12-14 14:39:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 14:39:02,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2022-12-14 14:39:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:02,073 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 14:39:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 14:39:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 14:39:02,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:02,074 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:02,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:02,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:02,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:02,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2022-12-14 14:39:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:02,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069425929] [2022-12-14 14:39:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:02,282 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 [2022-12-14 14:39:02,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:02,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:02,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:39:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:02,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:02,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069425929] [2022-12-14 14:39:02,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069425929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884138769] [2022-12-14 14:39:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:02,910 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:39:02,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:39:02,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:39:02,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 14:39:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 14:39:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:03,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:39:03,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1884138769] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:39:03,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:39:03,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7] total 17 [2022-12-14 14:39:03,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593218982] [2022-12-14 14:39:03,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:39:03,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:39:03,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:39:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:39:03,132 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:03,435 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2022-12-14 14:39:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:39:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 14:39:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:03,437 INFO L225 Difference]: With dead ends: 75 [2022-12-14 14:39:03,437 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 14:39:03,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:39:03,438 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:03,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 37 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:39:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 14:39:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-12-14 14:39:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-12-14 14:39:03,444 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2022-12-14 14:39:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:03,445 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-12-14 14:39:03,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-12-14 14:39:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 14:39:03,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:03,445 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:03,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 14:39:03,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 14:39:03,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:39:03,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:03,850 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2022-12-14 14:39:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:03,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372376775] [2022-12-14 14:39:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:03,852 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 [2022-12-14 14:39:03,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:03,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:03,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 14:39:03,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:04,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:04,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:39:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:04,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:04,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:04,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:39:04,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:04,187 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 53 treesize of output 29 [2022-12-14 14:39:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:39:04,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:05,697 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 77 treesize of output 73 [2022-12-14 14:39:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:39:08,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372376775] [2022-12-14 14:39:08,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372376775] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:08,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733515881] [2022-12-14 14:39:08,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:08,872 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:39:08,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:39:08,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:39:08,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 14:39:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:09,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:39:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:09,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:39:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:09,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:39:09,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:09,280 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 53 treesize of output 29 [2022-12-14 14:39:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:39:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:39:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733515881] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700679108] [2022-12-14 14:39:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:09,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:09,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:39:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:09,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:39:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:39:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:09,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:09,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:39:09,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:39:09,858 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 53 treesize of output 29 [2022-12-14 14:39:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:39:09,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:10,207 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 77 treesize of output 73 [2022-12-14 14:39:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:39:12,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700679108] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:12,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:39:12,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 7, 9, 8] total 16 [2022-12-14 14:39:12,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306256031] [2022-12-14 14:39:12,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:39:12,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 14:39:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 14:39:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:39:12,816 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:16,052 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 [1] [2022-12-14 14:39:18,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 14:39:22,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 14:39:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:22,855 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-12-14 14:39:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 14:39:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 14:39:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:22,857 INFO L225 Difference]: With dead ends: 89 [2022-12-14 14:39:22,857 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 14:39:22,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=265, Invalid=727, Unknown=0, NotChecked=0, Total=992 [2022-12-14 14:39:22,859 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 259 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:22,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 93 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 175 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2022-12-14 14:39:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 14:39:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 40. [2022-12-14 14:39:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-12-14 14:39:22,865 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2022-12-14 14:39:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:22,866 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-12-14 14:39:22,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:39:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-12-14 14:39:22,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 14:39:22,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:22,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:22,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:23,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-12-14 14:39:23,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 14:39:23,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:23,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:39:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2022-12-14 14:39:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762051702] [2022-12-14 14:39:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:39:23,473 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 [2022-12-14 14:39:23,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:23,475 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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) [2022-12-14 14:39:23,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4c7568-a64f-4810-92bf-66553b7f821e/bin/utaipan-gh47qXpMRh/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 [2022-12-14 14:39:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:39:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 14:39:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:23,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 8 [2022-12-14 14:39:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-12-14 14:39:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:39:23,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:23,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-12-14 14:39:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:24,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:39:24,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 81 [2022-12-14 14:39:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 65 [2022-12-14 14:39:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:24,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:36,459 WARN L233 SmtUtils]: Spent 5.05s on a formula simplification that was a NOOP. DAG size: 705 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:39:54,020 WARN L233 SmtUtils]: Spent 17.56s on a formula simplification. DAG size of input: 707 DAG size of output: 707 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:40:17,142 WARN L233 SmtUtils]: Spent 18.18s on a formula simplification. DAG size of input: 673 DAG size of output: 673 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-14 14:40:33,647 WARN L233 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 663 DAG size of output: 663 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)