./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- 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-8393723 [2022-11-19 07:34:03,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:34:03,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:34:03,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:34:03,109 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:34:03,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:34:03,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:34:03,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:34:03,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:34:03,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:34:03,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:34:03,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:34:03,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:34:03,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:34:03,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:34:03,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:34:03,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:34:03,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:34:03,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:34:03,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:34:03,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:34:03,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:34:03,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:34:03,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:34:03,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:34:03,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:34:03,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:34:03,152 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:34:03,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:34:03,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:34:03,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:34:03,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:34:03,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:34:03,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:34:03,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:34:03,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:34:03,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:34:03,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:34:03,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:34:03,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:34:03,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:34:03,167 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:34:03,212 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:34:03,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:34:03,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:34:03,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:34:03,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:34:03,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:34:03,214 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:34:03,215 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:34:03,215 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:34:03,215 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:34:03,216 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:34:03,216 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:34:03,216 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:34:03,217 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:34:03,217 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:34:03,217 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:34:03,218 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:34:03,218 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:34:03,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:34:03,219 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:34:03,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:34:03,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:34:03,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:34:03,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:34:03,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:34:03,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:34:03,221 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:34:03,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:34:03,222 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:34:03,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:34:03,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:34:03,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:34:03,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:03,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:34:03,224 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:34:03,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:34:03,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:34:03,225 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:34:03,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:34:03,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:34:03,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:34:03,226 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_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2022-11-19 07:34:03,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:34:03,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:34:03,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:34:03,536 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:34:03,539 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:34:03,541 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-19 07:34:03,636 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/data/cfc3fea02/606a88748ea3417c922a8522e17125c1/FLAGd824dfc96 [2022-11-19 07:34:04,210 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:34:04,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/sv-benchmarks/c/array-patterns/array4_pattern.c [2022-11-19 07:34:04,220 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/data/cfc3fea02/606a88748ea3417c922a8522e17125c1/FLAGd824dfc96 [2022-11-19 07:34:04,574 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/data/cfc3fea02/606a88748ea3417c922a8522e17125c1 [2022-11-19 07:34:04,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:34:04,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:34:04,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:04,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:34:04,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:34:04,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:04,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bd7185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04, skipping insertion in model container [2022-11-19 07:34:04,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:04,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:34:04,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:34:04,889 WARN L234 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_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-19 07:34:04,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:04,919 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:34:04,932 WARN L234 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_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2022-11-19 07:34:04,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:34:04,955 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:34:04,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04 WrapperNode [2022-11-19 07:34:04,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:34:04,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:04,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:34:04,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:34:04,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:04,971 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:04,999 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2022-11-19 07:34:04,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:34:05,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:34:05,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:34:05,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:34:05,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,026 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:34:05,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:34:05,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:34:05,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:34:05,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (1/1) ... [2022-11-19 07:34:05,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:34:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:05,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:34:05,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:34:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:34:05,119 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:34:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:34:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:34:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:34:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:34:05,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:34:05,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:34:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:34:05,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:34:05,217 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:34:05,219 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:34:05,429 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:34:05,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:34:05,489 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:34:05,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:05 BoogieIcfgContainer [2022-11-19 07:34:05,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:34:05,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:34:05,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:34:05,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:34:05,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:34:04" (1/3) ... [2022-11-19 07:34:05,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250f72f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:05, skipping insertion in model container [2022-11-19 07:34:05,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:34:04" (2/3) ... [2022-11-19 07:34:05,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@250f72f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:34:05, skipping insertion in model container [2022-11-19 07:34:05,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:34:05" (3/3) ... [2022-11-19 07:34:05,501 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2022-11-19 07:34:05,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:34:05,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:34:05,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:34:05,582 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;@4c2497d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:34:05,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:34:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:05,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:34:05,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:05,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:05,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:05,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1119781689, now seen corresponding path program 1 times [2022-11-19 07:34:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:05,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131030675] [2022-11-19 07:34:05,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:05,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:05,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:34:05,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:05,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131030675] [2022-11-19 07:34:05,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131030675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:05,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:05,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:34:05,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568056873] [2022-11-19 07:34:05,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:05,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:34:05,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:05,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:34:05,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:34:05,952 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:34:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:06,038 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2022-11-19 07:34:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:34:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-19 07:34:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:06,048 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:34:06,063 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 07:34:06,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:34:06,069 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:06,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 07:34:06,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 07:34:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-11-19 07:34:06,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 11 [2022-11-19 07:34:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:06,160 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-11-19 07:34:06,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:34:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-11-19 07:34:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:34:06,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:06,163 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:06,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:34:06,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:06,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:06,164 INFO L85 PathProgramCache]: Analyzing trace with hash -166120417, now seen corresponding path program 1 times [2022-11-19 07:34:06,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076893499] [2022-11-19 07:34:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:06,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:06,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945082126] [2022-11-19 07:34:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:06,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:06,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:34:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:06,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:34:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:06,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:06,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076893499] [2022-11-19 07:34:06,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945082126] [2022-11-19 07:34:06,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945082126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:06,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:06,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:34:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730171516] [2022-11-19 07:34:06,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:06,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:34:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:06,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:34:06,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:34:06,557 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:06,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:06,620 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-19 07:34:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:34:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2022-11-19 07:34:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:06,630 INFO L225 Difference]: With dead ends: 24 [2022-11-19 07:34:06,630 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:34:06,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:06,636 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:06,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:34:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:34:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 07:34:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-19 07:34:06,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 27 [2022-11-19 07:34:06,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:06,655 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-19 07:34:06,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:06,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-19 07:34:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:34:06,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:06,658 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:06,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:06,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:06,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:06,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:06,866 INFO L85 PathProgramCache]: Analyzing trace with hash -855080832, now seen corresponding path program 1 times [2022-11-19 07:34:06,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734646755] [2022-11-19 07:34:06,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:06,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872552022] [2022-11-19 07:34:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:06,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:06,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:06,926 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:06,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:34:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:07,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:34:07,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:07,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:34:07,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734646755] [2022-11-19 07:34:07,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872552022] [2022-11-19 07:34:07,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872552022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:34:07,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:34:07,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:34:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727743388] [2022-11-19 07:34:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:34:07,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:34:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:34:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:34:07,178 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:07,286 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-11-19 07:34:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:34:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-19 07:34:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:07,287 INFO L225 Difference]: With dead ends: 39 [2022-11-19 07:34:07,288 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:34:07,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:34:07,289 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:07,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 67 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:34:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:34:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 07:34:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-11-19 07:34:07,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 28 [2022-11-19 07:34:07,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:07,297 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-11-19 07:34:07,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:34:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-11-19 07:34:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:34:07,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:07,299 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:07,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:07,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:07,505 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash -70074783, now seen corresponding path program 1 times [2022-11-19 07:34:07,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:07,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645940774] [2022-11-19 07:34:07,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:07,566 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:07,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423902021] [2022-11-19 07:34:07,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:07,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:07,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:07,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:07,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:34:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-19 07:34:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:07,774 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 [2022-11-19 07:34:07,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:07,858 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 14 treesize of output 14 [2022-11-19 07:34:07,874 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:34:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:08,669 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 47 treesize of output 28 [2022-11-19 07:34:08,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:08,946 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:34:08,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 17 [2022-11-19 07:34:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:34:08,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:17,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645940774] [2022-11-19 07:34:17,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423902021] [2022-11-19 07:34:17,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423902021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586586010] [2022-11-19 07:34:17,251 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:17,251 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:17,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:17,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:17,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,504 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:34:17,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:34:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,669 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:17,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:17,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:34:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:17,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:17,945 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:34:17,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:34:18,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:18,076 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:18,076 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:18,418 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:18,419 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:18,617 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:18,620 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:21,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:21,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:21,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-19 07:34:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856369205] [2022-11-19 07:34:21,376 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:34:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:34:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1218, Unknown=3, NotChecked=0, Total=1406 [2022-11-19 07:34:21,378 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:34:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:21,700 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-11-19 07:34:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:34:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-11-19 07:34:21,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:21,704 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:34:21,704 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 07:34:21,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=195, Invalid=1362, Unknown=3, NotChecked=0, Total=1560 [2022-11-19 07:34:21,706 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:21,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 92 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-19 07:34:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 07:34:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-11-19 07:34:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 07:34:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-19 07:34:21,727 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 29 [2022-11-19 07:34:21,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:21,728 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-19 07:34:21,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:34:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-19 07:34:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:34:21,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:21,731 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:21,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:21,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:21,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1504691040, now seen corresponding path program 2 times [2022-11-19 07:34:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:21,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687967225] [2022-11-19 07:34:21,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:21,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:21,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843626093] [2022-11-19 07:34:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:34:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:21,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:21,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:34:22,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:34:22,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:22,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:34:22,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:22,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:22,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687967225] [2022-11-19 07:34:22,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843626093] [2022-11-19 07:34:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843626093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844522420] [2022-11-19 07:34:22,300 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:22,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:22,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:22,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:22,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,496 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,525 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 [2022-11-19 07:34:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:34:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:22,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:22,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:22,837 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:34:22,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:34:23,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:23,142 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:23,143 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:23,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:23,438 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:23,439 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:23,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:23,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:25,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '900#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:25,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:25,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:34:25,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 07:34:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110079788] [2022-11-19 07:34:25,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:34:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:34:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:34:25,725 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:25,997 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-19 07:34:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:34:26,003 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-19 07:34:26,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:26,005 INFO L225 Difference]: With dead ends: 68 [2022-11-19 07:34:26,005 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 07:34:26,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:34:26,007 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:26,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 111 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:34:26,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 07:34:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-11-19 07:34:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:34:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2022-11-19 07:34:26,020 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 30 [2022-11-19 07:34:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:26,021 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2022-11-19 07:34:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2022-11-19 07:34:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:34:26,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:26,022 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:26,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:26,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:26,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:26,230 INFO L85 PathProgramCache]: Analyzing trace with hash 2122333822, now seen corresponding path program 3 times [2022-11-19 07:34:26,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:26,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432164992] [2022-11-19 07:34:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:26,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:26,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:26,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884252150] [2022-11-19 07:34:26,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:34:26,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:26,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:26,272 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:34:26,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:34:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:34:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:26,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:26,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432164992] [2022-11-19 07:34:26,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884252150] [2022-11-19 07:34:26,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884252150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433156963] [2022-11-19 07:34:26,558 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:26,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:26,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:26,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:26,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,712 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,748 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 [2022-11-19 07:34:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:34:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:26,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:26,968 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:34:26,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:34:27,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:27,067 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:27,068 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:27,356 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:27,357 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:27,512 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:27,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:29,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1285#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:29,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:29,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:34:29,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 07:34:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143659891] [2022-11-19 07:34:29,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:29,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:34:29,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:34:29,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:34:29,381 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:29,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:29,595 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-11-19 07:34:29,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:34:29,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 30 [2022-11-19 07:34:29,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:29,597 INFO L225 Difference]: With dead ends: 71 [2022-11-19 07:34:29,597 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 07:34:29,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:34:29,598 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:29,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 118 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:34:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 07:34:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2022-11-19 07:34:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 07:34:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-11-19 07:34:29,613 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 30 [2022-11-19 07:34:29,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:29,614 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-11-19 07:34:29,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-11-19 07:34:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:34:29,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:29,616 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:29,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:29,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:34:29,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:29,823 INFO L85 PathProgramCache]: Analyzing trace with hash 598902815, now seen corresponding path program 4 times [2022-11-19 07:34:29,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:29,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606145243] [2022-11-19 07:34:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:29,857 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:29,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808116635] [2022-11-19 07:34:29,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:34:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:29,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:29,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:34:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-19 07:34:29,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:30,009 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 [2022-11-19 07:34:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:30,081 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:34:30,086 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 20 treesize of output 20 [2022-11-19 07:34:30,091 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:34:30,103 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:34:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:30,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:30,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 48 treesize of output 39 [2022-11-19 07:34:31,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:31,526 INFO L321 Elim1Store]: treesize reduction 64, result has 47.1 percent of original size [2022-11-19 07:34:31,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 93 [2022-11-19 07:34:31,970 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-19 07:34:31,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 46 [2022-11-19 07:34:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:34:32,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:32,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:32,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606145243] [2022-11-19 07:34:32,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808116635] [2022-11-19 07:34:32,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808116635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405750797] [2022-11-19 07:34:32,622 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:32,622 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:32,622 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:32,623 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:32,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,790 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,815 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 [2022-11-19 07:34:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:34:32,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:32,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:32,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:32,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:33,057 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:34:33,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:34:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:33,235 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:33,236 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:34,157 INFO L321 Elim1Store]: treesize reduction 53, result has 39.1 percent of original size [2022-11-19 07:34:34,158 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 3 case distinctions, treesize of input 224 treesize of output 186 [2022-11-19 07:34:34,640 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-19 07:34:34,648 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:38,614 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1662#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:38,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:38,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:38,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-19 07:34:38,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248594976] [2022-11-19 07:34:38,615 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:34:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:34:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 07:34:38,617 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:34:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:39,644 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-11-19 07:34:39,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:34:39,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-11-19 07:34:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:39,647 INFO L225 Difference]: With dead ends: 84 [2022-11-19 07:34:39,648 INFO L226 Difference]: Without dead ends: 81 [2022-11-19 07:34:39,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:34:39,652 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:39,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 147 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 414 Invalid, 0 Unknown, 165 Unchecked, 0.7s Time] [2022-11-19 07:34:39,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-19 07:34:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2022-11-19 07:34:39,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 18 states have call successors, (18), 8 states have call predecessors, (18), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-19 07:34:39,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2022-11-19 07:34:39,673 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 31 [2022-11-19 07:34:39,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:39,673 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2022-11-19 07:34:39,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-19 07:34:39,674 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2022-11-19 07:34:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:34:39,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:39,675 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:39,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:39,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:39,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash 617181854, now seen corresponding path program 5 times [2022-11-19 07:34:39,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:39,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396789174] [2022-11-19 07:34:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:39,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:39,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:39,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680924274] [2022-11-19 07:34:39,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:34:39,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:39,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:39,923 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:39,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:34:40,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:34:40,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:40,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:34:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:40,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:40,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396789174] [2022-11-19 07:34:40,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:40,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680924274] [2022-11-19 07:34:40,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680924274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:40,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1015768459] [2022-11-19 07:34:40,264 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:40,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:40,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:40,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:40,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,397 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:40,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:40,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,420 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 [2022-11-19 07:34:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:34:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:40,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:40,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:40,652 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:34:40,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:34:40,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:40,882 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:40,883 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:41,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:41,119 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:41,119 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:41,255 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:41,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:43,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2134#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:43,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:43,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:34:43,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 07:34:43,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744639512] [2022-11-19 07:34:43,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:43,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:34:43,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:43,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:34:43,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:34:43,034 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:43,418 INFO L93 Difference]: Finished difference Result 128 states and 161 transitions. [2022-11-19 07:34:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:34:43,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-19 07:34:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:43,420 INFO L225 Difference]: With dead ends: 128 [2022-11-19 07:34:43,420 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 07:34:43,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:34:43,421 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:43,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:34:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 07:34:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2022-11-19 07:34:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:34:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-11-19 07:34:43,446 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 32 [2022-11-19 07:34:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:43,446 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-11-19 07:34:43,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-11-19 07:34:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:34:43,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:43,448 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:43,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 07:34:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:43,656 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1385802880, now seen corresponding path program 6 times [2022-11-19 07:34:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:43,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381863907] [2022-11-19 07:34:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:43,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:43,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190435636] [2022-11-19 07:34:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:34:43,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:43,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:43,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:34:43,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:34:43,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:43,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:34:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:43,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:43,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381863907] [2022-11-19 07:34:43,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:43,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190435636] [2022-11-19 07:34:43,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190435636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:43,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676047670] [2022-11-19 07:34:43,996 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:43,997 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:43,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:43,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:43,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:44,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,113 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:44,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:44,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,133 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 [2022-11-19 07:34:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:34:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:44,337 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:34:44,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:34:44,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:44,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:44,443 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:44,662 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:44,662 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:44,792 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:44,794 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:46,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2687#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:46,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:46,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:34:46,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 07:34:46,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926030222] [2022-11-19 07:34:46,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:46,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:34:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:34:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2022-11-19 07:34:46,682 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:47,047 INFO L93 Difference]: Finished difference Result 153 states and 198 transitions. [2022-11-19 07:34:47,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:34:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 32 [2022-11-19 07:34:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:47,049 INFO L225 Difference]: With dead ends: 153 [2022-11-19 07:34:47,049 INFO L226 Difference]: Without dead ends: 145 [2022-11-19 07:34:47,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:34:47,050 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 85 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:47,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 171 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:34:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-19 07:34:47,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 85. [2022-11-19 07:34:47,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-19 07:34:47,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-11-19 07:34:47,079 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 32 [2022-11-19 07:34:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:47,080 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-11-19 07:34:47,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:34:47,080 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-11-19 07:34:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:34:47,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:47,082 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:47,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:47,292 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:47,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1952453089, now seen corresponding path program 7 times [2022-11-19 07:34:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:47,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036569281] [2022-11-19 07:34:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:47,310 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:47,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54615236] [2022-11-19 07:34:47,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:34:47,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:47,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:47,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:34:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:47,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-19 07:34:47,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:47,484 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 [2022-11-19 07:34:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,529 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:34:47,534 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 20 treesize of output 20 [2022-11-19 07:34:47,538 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:34:47,546 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:34:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-19 07:34:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:47,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-19 07:34:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:49,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:49,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:49,375 INFO L321 Elim1Store]: treesize reduction 98, result has 47.0 percent of original size [2022-11-19 07:34:49,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 6 case distinctions, treesize of input 90 treesize of output 129 [2022-11-19 07:34:50,197 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:34:50,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2022-11-19 07:34:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:34:50,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:51,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036569281] [2022-11-19 07:34:51,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54615236] [2022-11-19 07:34:51,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54615236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:51,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562319497] [2022-11-19 07:34:51,489 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:51,490 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:51,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:51,490 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:51,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,613 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:34:51,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:34:51,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,721 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:51,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:51,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:34:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:51,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:51,935 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:34:51,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:34:52,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:52,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:52,245 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:52,467 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:52,467 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:52,590 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:52,592 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:55,359 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3262#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:55,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:55,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:34:55,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-19 07:34:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414397704] [2022-11-19 07:34:55,360 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:34:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:34:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 07:34:55,362 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:56,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:34:56,804 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2022-11-19 07:34:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:34:56,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 33 [2022-11-19 07:34:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:34:56,808 INFO L225 Difference]: With dead ends: 118 [2022-11-19 07:34:56,808 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 07:34:56,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:34:56,809 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:34:56,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 165 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 470 Invalid, 0 Unknown, 122 Unchecked, 0.8s Time] [2022-11-19 07:34:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 07:34:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-19 07:34:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 27 states have call successors, (27), 12 states have call predecessors, (27), 12 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-19 07:34:56,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2022-11-19 07:34:56,842 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 33 [2022-11-19 07:34:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:34:56,843 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2022-11-19 07:34:56,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:34:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2022-11-19 07:34:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:34:56,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:34:56,844 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:34:56,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:34:57,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:34:57,050 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:34:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:34:57,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1956226912, now seen corresponding path program 8 times [2022-11-19 07:34:57,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:34:57,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247428376] [2022-11-19 07:34:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:34:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:34:57,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:34:57,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607414252] [2022-11-19 07:34:57,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:34:57,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:57,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:57,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:34:57,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:34:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:34:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:34:57,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:34:57,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247428376] [2022-11-19 07:34:57,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:34:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607414252] [2022-11-19 07:34:57,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607414252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:57,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162352783] [2022-11-19 07:34:57,493 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:34:57,493 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:57,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:57,493 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:57,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,611 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:34:57,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:34:57,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,630 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 [2022-11-19 07:34:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:34:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:57,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:57,788 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:34:57,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:34:57,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:57,867 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:34:57,868 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:34:58,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:58,100 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:34:58,100 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:34:58,204 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:34:58,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:34:59,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3855#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:34:59,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:34:59,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:34:59,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 07:34:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602607596] [2022-11-19 07:34:59,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:34:59,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:34:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:34:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:34:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:34:59,988 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:00,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:00,406 INFO L93 Difference]: Finished difference Result 177 states and 221 transitions. [2022-11-19 07:35:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:35:00,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-19 07:35:00,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:00,408 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:35:00,409 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:35:00,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:35:00,410 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:00,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 157 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:35:00,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:35:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 116. [2022-11-19 07:35:00,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 73 states have internal predecessors, (81), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-19 07:35:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-11-19 07:35:00,449 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 34 [2022-11-19 07:35:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:00,450 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-11-19 07:35:00,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-11-19 07:35:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:35:00,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:00,452 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:00,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:00,657 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:00,658 INFO L85 PathProgramCache]: Analyzing trace with hash 396188414, now seen corresponding path program 9 times [2022-11-19 07:35:00,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:00,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015609797] [2022-11-19 07:35:00,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:00,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:00,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62219937] [2022-11-19 07:35:00,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:00,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:00,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:00,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:00,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:35:00,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:00,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:00,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:35:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:35:00,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:35:01,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015609797] [2022-11-19 07:35:01,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62219937] [2022-11-19 07:35:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62219937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527765916] [2022-11-19 07:35:01,020 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:01,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:01,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:01,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:01,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:01,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,130 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:01,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,146 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 [2022-11-19 07:35:01,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:35:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:01,318 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:35:01,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:35:01,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:01,395 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:01,395 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:01,628 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:01,628 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:01,743 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:01,745 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:03,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4553#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:03,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:03,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:03,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 07:35:03,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185562061] [2022-11-19 07:35:03,527 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:03,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:35:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:35:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:35:03,529 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:04,129 INFO L93 Difference]: Finished difference Result 248 states and 327 transitions. [2022-11-19 07:35:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:35:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2022-11-19 07:35:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:04,132 INFO L225 Difference]: With dead ends: 248 [2022-11-19 07:35:04,132 INFO L226 Difference]: Without dead ends: 239 [2022-11-19 07:35:04,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:35:04,133 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 154 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:04,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 230 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:35:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-19 07:35:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 117. [2022-11-19 07:35:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.125) internal successors, (81), 74 states have internal predecessors, (81), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-19 07:35:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2022-11-19 07:35:04,177 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 34 [2022-11-19 07:35:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:04,177 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2022-11-19 07:35:04,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:04,179 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2022-11-19 07:35:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 07:35:04,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:04,180 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:04,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:04,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:04,383 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -513807329, now seen corresponding path program 10 times [2022-11-19 07:35:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255990835] [2022-11-19 07:35:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:04,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:04,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022631997] [2022-11-19 07:35:04,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:35:04,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:04,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:04,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:35:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:04,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 125 conjunts are in the unsatisfiable core [2022-11-19 07:35:04,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:04,622 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 [2022-11-19 07:35:04,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,667 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-19 07:35:04,673 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 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:35:04,678 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 29 treesize of output 28 [2022-11-19 07:35:04,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 55 [2022-11-19 07:35:04,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-11-19 07:35:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:04,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 87 [2022-11-19 07:35:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:06,840 INFO L321 Elim1Store]: treesize reduction 132, result has 47.0 percent of original size [2022-11-19 07:35:06,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 165 [2022-11-19 07:35:08,541 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-19 07:35:08,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 120 [2022-11-19 07:35:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:35:08,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:11,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255990835] [2022-11-19 07:35:11,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022631997] [2022-11-19 07:35:11,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022631997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:11,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704342457] [2022-11-19 07:35:11,529 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:11,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:11,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:11,530 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:11,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:11,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,635 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:11,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:11,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,651 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 [2022-11-19 07:35:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:35:11,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:11,816 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:35:11,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:35:11,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:11,900 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:11,901 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:12,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:12,126 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:12,127 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:12,246 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:12,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:15,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5347#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:15,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:15,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:15,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-19 07:35:15,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749037351] [2022-11-19 07:35:15,712 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:15,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:35:15,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:15,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:35:15,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:35:15,715 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:18,348 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2022-11-19 07:35:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:35:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 35 [2022-11-19 07:35:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:18,350 INFO L225 Difference]: With dead ends: 152 [2022-11-19 07:35:18,350 INFO L226 Difference]: Without dead ends: 149 [2022-11-19 07:35:18,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=352, Invalid=3554, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 07:35:18,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:18,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 731 Invalid, 0 Unknown, 130 Unchecked, 1.3s Time] [2022-11-19 07:35:18,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-19 07:35:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2022-11-19 07:35:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 84 states have (on average 1.130952380952381) internal successors, (95), 87 states have internal predecessors, (95), 36 states have call successors, (36), 16 states have call predecessors, (36), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-11-19 07:35:18,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2022-11-19 07:35:18,395 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 35 [2022-11-19 07:35:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:18,395 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2022-11-19 07:35:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:18,396 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2022-11-19 07:35:18,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:35:18,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:18,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:18,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:18,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:18,603 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:18,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1341095710, now seen corresponding path program 11 times [2022-11-19 07:35:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431192750] [2022-11-19 07:35:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:18,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:18,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:18,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282297542] [2022-11-19 07:35:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:18,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:18,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:18,625 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:18,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:35:18,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:35:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:35:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:35:18,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:35:19,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431192750] [2022-11-19 07:35:19,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282297542] [2022-11-19 07:35:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282297542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [437676075] [2022-11-19 07:35:19,069 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:19,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:19,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:19,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:19,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:19,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,175 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-19 07:35:19,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-19 07:35:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,295 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:19,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:35:19,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:19,504 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:35:19,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:35:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:19,583 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:19,584 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:19,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:19,799 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:19,799 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:19,909 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:19,911 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:21,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6064#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:21,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:21,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:21,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 07:35:21,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814716409] [2022-11-19 07:35:21,645 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:21,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:21,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:21,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:21,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:35:21,647 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:22,165 INFO L93 Difference]: Finished difference Result 227 states and 282 transitions. [2022-11-19 07:35:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:35:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-19 07:35:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:22,168 INFO L225 Difference]: With dead ends: 227 [2022-11-19 07:35:22,168 INFO L226 Difference]: Without dead ends: 224 [2022-11-19 07:35:22,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=281, Invalid=1525, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 07:35:22,170 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 116 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:22,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 257 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:35:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-19 07:35:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2022-11-19 07:35:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 93 states have internal predecessors, (102), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 07:35:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2022-11-19 07:35:22,224 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 36 [2022-11-19 07:35:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:22,224 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2022-11-19 07:35:22,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:22,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2022-11-19 07:35:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:35:22,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:22,226 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:22,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:22,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:22,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1251526784, now seen corresponding path program 12 times [2022-11-19 07:35:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:22,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309302741] [2022-11-19 07:35:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:22,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526739972] [2022-11-19 07:35:22,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:22,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:22,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:22,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:35:22,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:22,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:35:22,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:35:22,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:35:22,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309302741] [2022-11-19 07:35:22,905 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526739972] [2022-11-19 07:35:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526739972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:22,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929371110] [2022-11-19 07:35:22,907 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:22,907 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:22,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:22,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:22,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:22,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,019 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:23,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,035 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 [2022-11-19 07:35:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:35:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:23,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:23,227 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:35:23,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:35:23,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:23,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:23,451 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:23,661 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:23,662 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:23,770 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:23,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:25,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6909#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:25,571 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:25,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:25,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-19 07:35:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695035673] [2022-11-19 07:35:25,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:25,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:35:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:35:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:35:25,573 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:26,567 INFO L93 Difference]: Finished difference Result 373 states and 496 transitions. [2022-11-19 07:35:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:35:26,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 36 [2022-11-19 07:35:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:26,570 INFO L225 Difference]: With dead ends: 373 [2022-11-19 07:35:26,570 INFO L226 Difference]: Without dead ends: 363 [2022-11-19 07:35:26,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:35:26,572 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 285 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:26,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 295 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:35:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-19 07:35:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 149. [2022-11-19 07:35:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.120879120879121) internal successors, (102), 94 states have internal predecessors, (102), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 37 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-19 07:35:26,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 182 transitions. [2022-11-19 07:35:26,626 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 182 transitions. Word has length 36 [2022-11-19 07:35:26,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:26,627 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 182 transitions. [2022-11-19 07:35:26,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 182 transitions. [2022-11-19 07:35:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 07:35:26,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:26,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:26,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 07:35:26,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:35:26,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1376021151, now seen corresponding path program 13 times [2022-11-19 07:35:26,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:26,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899526597] [2022-11-19 07:35:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:26,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:26,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:26,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89048697] [2022-11-19 07:35:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:35:26,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:26,857 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:26,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:35:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:27,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-19 07:35:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:27,139 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 [2022-11-19 07:35:27,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,185 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 33 [2022-11-19 07:35:27,198 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 0 case distinctions, treesize of input 13 treesize of output 12 [2022-11-19 07:35:27,203 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 29 treesize of output 28 [2022-11-19 07:35:27,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 67 treesize of output 55 [2022-11-19 07:35:27,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 85 [2022-11-19 07:35:27,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 115 [2022-11-19 07:35:27,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:27,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 111 [2022-11-19 07:35:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:29,875 INFO L321 Elim1Store]: treesize reduction 166, result has 47.0 percent of original size [2022-11-19 07:35:29,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 126 treesize of output 201 [2022-11-19 07:35:32,663 INFO L321 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2022-11-19 07:35:32,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2022-11-19 07:35:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:35:32,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:37,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899526597] [2022-11-19 07:35:37,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89048697] [2022-11-19 07:35:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89048697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:35:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002219003] [2022-11-19 07:35:37,116 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:37,116 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:37,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:37,117 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:37,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:37,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,220 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:37,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:37,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,238 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 [2022-11-19 07:35:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:35:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:37,378 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:35:37,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 362 treesize of output 348 [2022-11-19 07:35:37,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:37,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:37,459 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:37,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:37,662 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:37,662 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:37,770 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:37,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:41,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7972#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:41,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:41,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:35:41,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-11-19 07:35:41,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208380325] [2022-11-19 07:35:41,490 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:41,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:35:41,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:41,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:35:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=3113, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 07:35:41,492 INFO L87 Difference]: Start difference. First operand 149 states and 182 transitions. Second operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:44,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:44,990 INFO L93 Difference]: Finished difference Result 186 states and 226 transitions. [2022-11-19 07:35:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:35:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-11-19 07:35:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:44,993 INFO L225 Difference]: With dead ends: 186 [2022-11-19 07:35:44,993 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 07:35:44,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=372, Invalid=4050, Unknown=0, NotChecked=0, Total=4422 [2022-11-19 07:35:44,995 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:44,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 170 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 691 Invalid, 0 Unknown, 131 Unchecked, 1.6s Time] [2022-11-19 07:35:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 07:35:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-11-19 07:35:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 107 states have internal predecessors, (116), 45 states have call successors, (45), 20 states have call predecessors, (45), 20 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-11-19 07:35:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2022-11-19 07:35:45,081 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 37 [2022-11-19 07:35:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:45,082 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2022-11-19 07:35:45,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 07:35:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2022-11-19 07:35:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:35:45,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:45,085 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:45,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:45,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:35:45,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1225628512, now seen corresponding path program 14 times [2022-11-19 07:35:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:45,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946788057] [2022-11-19 07:35:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:45,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:45,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415855873] [2022-11-19 07:35:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:35:45,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:45,353 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:45,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:35:45,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:35:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:45,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:35:45,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:35:45,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:45,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:35:45,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946788057] [2022-11-19 07:35:45,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:45,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415855873] [2022-11-19 07:35:45,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415855873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:45,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980120131] [2022-11-19 07:35:45,913 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:45,913 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:45,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:45,914 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:45,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,019 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:46,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,035 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 [2022-11-19 07:35:46,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:35:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:46,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:46,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:46,226 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:35:46,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:35:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:46,393 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:46,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:46,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:46,619 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:46,619 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:46,730 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:46,731 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:48,488 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8812#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:48,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:48,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:48,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-19 07:35:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155831113] [2022-11-19 07:35:48,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:48,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:35:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:35:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:35:48,491 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:49,273 INFO L93 Difference]: Finished difference Result 278 states and 344 transitions. [2022-11-19 07:35:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:35:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-19 07:35:49,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:49,275 INFO L225 Difference]: With dead ends: 278 [2022-11-19 07:35:49,275 INFO L226 Difference]: Without dead ends: 275 [2022-11-19 07:35:49,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 07:35:49,277 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 131 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:49,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 295 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:35:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-19 07:35:49,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 180. [2022-11-19 07:35:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 109 states have (on average 1.128440366972477) internal successors, (123), 113 states have internal predecessors, (123), 49 states have call successors, (49), 21 states have call predecessors, (49), 21 states have return successors, (49), 45 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-19 07:35:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 221 transitions. [2022-11-19 07:35:49,347 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 221 transitions. Word has length 38 [2022-11-19 07:35:49,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:49,347 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 221 transitions. [2022-11-19 07:35:49,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 221 transitions. [2022-11-19 07:35:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:35:49,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:49,349 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:49,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:49,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:49,564 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash 292702078, now seen corresponding path program 15 times [2022-11-19 07:35:49,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:49,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619096473] [2022-11-19 07:35:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:49,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:49,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434722398] [2022-11-19 07:35:49,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:35:49,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:49,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:49,612 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:49,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:35:49,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:35:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:35:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:35:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:35:49,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:35:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:35:50,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:35:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619096473] [2022-11-19 07:35:50,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:35:50,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434722398] [2022-11-19 07:35:50,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434722398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:35:50,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330399885] [2022-11-19 07:35:50,132 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 07:35:50,133 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:35:50,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:35:50,133 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:35:50,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:35:50,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,244 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-19 07:35:50,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-19 07:35:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,263 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 [2022-11-19 07:35:50,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:35:50,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:50,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:50,459 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:35:50,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 353 [2022-11-19 07:35:50,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:35:50,669 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:35:50,669 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 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-19 07:35:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:50,864 INFO L321 Elim1Store]: treesize reduction 49, result has 37.2 percent of original size [2022-11-19 07:35:50,864 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 3 case distinctions, treesize of input 78 treesize of output 59 [2022-11-19 07:35:50,967 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2022-11-19 07:35:50,969 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:52,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9806#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ |ULTIMATE.start_main_~index2~0#1| 32768)) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_main_~index1~0#1| 32768)) (<= |ULTIMATE.start_main_~index2~0#1| 32767) (<= |ULTIMATE.start_main_~index1~0#1| 32767) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:52,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:52,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:35:52,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-19 07:35:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627126302] [2022-11-19 07:35:52,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:52,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:35:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:52,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:35:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1218, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:35:52,852 INFO L87 Difference]: Start difference. First operand 180 states and 221 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:54,422 INFO L93 Difference]: Finished difference Result 524 states and 701 transitions. [2022-11-19 07:35:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:35:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 38 [2022-11-19 07:35:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:54,425 INFO L225 Difference]: With dead ends: 524 [2022-11-19 07:35:54,425 INFO L226 Difference]: Without dead ends: 513 [2022-11-19 07:35:54,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:35:54,427 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 544 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:54,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 377 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:35:54,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-19 07:35:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 181. [2022-11-19 07:35:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 114 states have internal predecessors, (123), 49 states have call successors, (49), 21 states have call predecessors, (49), 21 states have return successors, (49), 45 states have call predecessors, (49), 49 states have call successors, (49) [2022-11-19 07:35:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 221 transitions. [2022-11-19 07:35:54,527 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 221 transitions. Word has length 38 [2022-11-19 07:35:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:54,527 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 221 transitions. [2022-11-19 07:35:54,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-19 07:35:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 221 transitions. [2022-11-19 07:35:54,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 07:35:54,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:54,529 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:54,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:54,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:35:54,735 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:54,735 INFO L85 PathProgramCache]: Analyzing trace with hash 659906591, now seen corresponding path program 16 times [2022-11-19 07:35:54,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:54,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189840760] [2022-11-19 07:35:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:54,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:54,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:35:54,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598215606] [2022-11-19 07:35:54,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:35:54,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:35:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:35:54,761 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:35:54,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f3a506-73c2-4ae8-b477-fc1eddbc8f2d/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:35:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:35:55,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 159 conjunts are in the unsatisfiable core [2022-11-19 07:35:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:35:55,270 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 [2022-11-19 07:35:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,304 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-19 07:35:55,310 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:35:55,314 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 [2022-11-19 07:35:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 57 treesize of output 45 [2022-11-19 07:35:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-19 07:35:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 93 [2022-11-19 07:35:55,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 123 [2022-11-19 07:35:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:55,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 135 [2022-11-19 07:35:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:35:58,532 INFO L321 Elim1Store]: treesize reduction 200, result has 46.9 percent of original size [2022-11-19 07:35:58,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 237 [2022-11-19 07:36:02,991 INFO L321 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2022-11-19 07:36:02,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 470 treesize of output 218 [2022-11-19 07:36:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:36:03,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:36:24,401 WARN L233 SmtUtils]: Spent 14.05s on a formula simplification. DAG size of input: 34 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:36:36,013 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:37:39,965 WARN L233 SmtUtils]: Spent 36.18s on a formula simplification. DAG size of input: 28 DAG size of output: 25 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 07:37:39,966 INFO L321 Elim1Store]: treesize reduction 17, result has 66.0 percent of original size [2022-11-19 07:37:39,966 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 2764842 treesize of output 1766474 [2022-11-19 07:37:43,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:37:43,060 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 918565 treesize of output 649775