./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI --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 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- 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-5e519f3 [2022-11-03 03:40:58,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:40:58,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:40:58,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:40:58,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:40:58,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:40:58,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:40:58,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:40:58,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:40:58,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:40:58,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:40:58,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:40:58,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:40:58,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:40:58,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:40:58,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:40:58,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:40:58,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:40:58,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:40:58,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:40:58,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:40:58,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:40:58,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:40:58,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:40:58,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:40:58,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:40:58,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:40:58,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:40:58,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:40:58,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:40:58,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:40:58,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:40:58,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:40:58,221 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:40:58,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:40:58,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:40:58,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:40:58,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:40:58,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:40:58,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:40:58,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:40:58,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:40:58,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:40:58,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:40:58,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:40:58,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:40:58,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:40:58,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:40:58,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:40:58,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:40:58,289 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:40:58,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:40:58,290 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:40:58,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:40:58,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:40:58,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:40:58,291 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:40:58,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:40:58,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:40:58,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:40:58,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:40:58,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:40:58,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:40:58,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:40:58,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:40:58,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:40:58,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:40:58,295 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:40:58,295 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:40:58,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:40:58,296 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:40:58,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:40:58,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:40:58,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:40:58,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:40:58,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:40:58,298 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:40:58,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:40:58,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:40:58,299 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:40:58,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:40:58,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:40:58,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:40:58,300 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_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-11-03 03:40:58,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:40:58,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:40:58,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:40:58,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:40:58,700 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:40:58,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-03 03:40:58,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/data/7ec1e004c/ab960f72e0e24586b1d1bcb99b729ac3/FLAG8f35ec6e1 [2022-11-03 03:40:59,423 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:40:59,423 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-03 03:40:59,434 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/data/7ec1e004c/ab960f72e0e24586b1d1bcb99b729ac3/FLAG8f35ec6e1 [2022-11-03 03:40:59,777 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/data/7ec1e004c/ab960f72e0e24586b1d1bcb99b729ac3 [2022-11-03 03:40:59,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:40:59,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:40:59,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:40:59,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:40:59,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:40:59,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:59" (1/1) ... [2022-11-03 03:40:59,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b9f116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:40:59, skipping insertion in model container [2022-11-03 03:40:59,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:40:59" (1/1) ... [2022-11-03 03:40:59,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:40:59,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:41:00,089 WARN L230 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_05ef6fbf-cd0c-4647-976a-e5095ad629a1/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-03 03:41:00,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:41:00,127 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:41:00,142 WARN L230 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_05ef6fbf-cd0c-4647-976a-e5095ad629a1/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-03 03:41:00,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:41:00,169 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:41:00,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00 WrapperNode [2022-11-03 03:41:00,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:41:00,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:41:00,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:41:00,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:41:00,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,211 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-03 03:41:00,212 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:41:00,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:41:00,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:41:00,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:41:00,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:41:00,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:41:00,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:41:00,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:41:00,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (1/1) ... [2022-11-03 03:41:00,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:41:00,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:00,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:41:00,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:41:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:41:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 03:41:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 03:41:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:41:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:41:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:41:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:41:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:41:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:41:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:41:00,479 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:41:00,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:41:00,726 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:41:00,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:41:00,801 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 03:41:00,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:00 BoogieIcfgContainer [2022-11-03 03:41:00,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:41:00,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:41:00,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:41:00,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:41:00,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:40:59" (1/3) ... [2022-11-03 03:41:00,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b0a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:00, skipping insertion in model container [2022-11-03 03:41:00,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:00" (2/3) ... [2022-11-03 03:41:00,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41b0a902 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:41:00, skipping insertion in model container [2022-11-03 03:41:00,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:41:00" (3/3) ... [2022-11-03 03:41:00,831 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-11-03 03:41:00,871 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:41:00,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:41:01,006 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:41:01,033 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;@552b8bc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:41:01,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:41:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:41:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:41:01,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:01,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:41:01,056 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:01,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-11-03 03:41:01,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:01,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790811285] [2022-11-03 03:41:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:01,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:41:01,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790811285] [2022-11-03 03:41:01,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790811285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:41:01,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:41:01,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:41:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166825907] [2022-11-03 03:41:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:41:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:41:01,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:41:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:41:01,607 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:01,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:01,682 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-03 03:41:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:41:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:41:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:01,694 INFO L225 Difference]: With dead ends: 27 [2022-11-03 03:41:01,694 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 03:41:01,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:41:01,702 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:01,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:41:01,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 03:41:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-03 03:41:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:41:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-03 03:41:01,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-11-03 03:41:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:01,792 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-03 03:41:01,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:41:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-03 03:41:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:41:01,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:01,797 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:01,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:41:01,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:01,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-11-03 03:41:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:01,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323356933] [2022-11-03 03:41:01,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:41:02,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:02,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323356933] [2022-11-03 03:41:02,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323356933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:41:02,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:41:02,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:41:02,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033678777] [2022-11-03 03:41:02,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:41:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:41:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:41:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:41:02,023 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:41:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:02,101 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-03 03:41:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:41:02,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-03 03:41:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:02,104 INFO L225 Difference]: With dead ends: 25 [2022-11-03 03:41:02,104 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:41:02,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:41:02,107 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:41:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:41:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-03 03:41:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 03:41:02,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-03 03:41:02,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-11-03 03:41:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:02,119 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-03 03:41:02,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 03:41:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-03 03:41:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 03:41:02,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:02,121 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:02,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:41:02,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-11-03 03:41:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:02,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544026585] [2022-11-03 03:41:02,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:02,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:41:02,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544026585] [2022-11-03 03:41:02,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544026585] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:02,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480656284] [2022-11-03 03:41:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:02,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:02,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:02,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:02,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:41:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:41:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:41:02,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:41:02,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480656284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542456980] [2022-11-03 03:41:02,852 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:41:02,852 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:41:02,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:41:02,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:41:02,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:41:03,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,285 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 03:41:03,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 03:41:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:03,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2022-11-03 03:41:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:04,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-03 03:41:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:08,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:08,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:08,501 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:41:08,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 561 treesize of output 527 [2022-11-03 03:41:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:14,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:14,507 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:14,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:15,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:15,678 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:15,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:15,787 INFO L356 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-03 03:41:15,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-03 03:41:15,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:15,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:15,891 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:15,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:16,127 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-03 03:41:16,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:41:16,998 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-03 03:41:16,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:41:16,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:41:16,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-03 03:41:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108807734] [2022-11-03 03:41:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:17,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:41:17,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:41:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-03 03:41:17,002 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:41:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:17,230 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-03 03:41:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:41:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-11-03 03:41:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:17,235 INFO L225 Difference]: With dead ends: 52 [2022-11-03 03:41:17,235 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:41:17,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:41:17,245 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:17,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 18 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 03:41:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:41:17,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-11-03 03:41:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-03 03:41:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-11-03 03:41:17,269 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-11-03 03:41:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:17,269 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-11-03 03:41:17,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 03:41:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-11-03 03:41:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 03:41:17,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:17,274 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:17,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:17,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:17,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:17,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:17,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-11-03 03:41:17,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:17,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986571663] [2022-11-03 03:41:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:17,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 03:41:17,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:17,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986571663] [2022-11-03 03:41:17,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986571663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843944033] [2022-11-03 03:41:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:41:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:17,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:17,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:17,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:41:17,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:41:17,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:41:17,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:41:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:41:18,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-03 03:41:18,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843944033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613795966] [2022-11-03 03:41:18,365 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:41:18,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:41:18,365 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:41:18,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:41:18,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:41:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,510 INFO L356 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2022-11-03 03:41:18,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2022-11-03 03:41:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:18,668 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 03:41:18,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 03:41:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:19,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-03 03:41:22,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:22,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:22,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:22,140 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:41:22,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 561 treesize of output 527 [2022-11-03 03:41:26,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:26,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:26,351 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:26,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:27,280 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:27,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:27,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:27,391 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:27,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:27,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:27,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:27,481 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:27,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:27,768 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-03 03:41:27,780 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:41:28,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-03 03:41:28,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:41:28,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:41:28,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-11-03 03:41:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009968261] [2022-11-03 03:41:28,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 03:41:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 03:41:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-11-03 03:41:28,780 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-03 03:41:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:29,346 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-03 03:41:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:41:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-11-03 03:41:29,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:29,355 INFO L225 Difference]: With dead ends: 121 [2022-11-03 03:41:29,356 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 03:41:29,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:41:29,363 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 167 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:29,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 42 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:41:29,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 03:41:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-11-03 03:41:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-03 03:41:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-11-03 03:41:29,402 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-11-03 03:41:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:29,403 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-11-03 03:41:29,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-03 03:41:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-11-03 03:41:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 03:41:29,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:29,412 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:29,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:29,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:29,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-11-03 03:41:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:29,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740010522] [2022-11-03 03:41:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:29,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-03 03:41:30,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740010522] [2022-11-03 03:41:30,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740010522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:30,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724365112] [2022-11-03 03:41:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:41:30,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:30,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:30,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:41:33,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:41:33,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:41:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:41:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-03 03:41:34,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-03 03:41:34,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724365112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1928108777] [2022-11-03 03:41:34,838 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:41:34,838 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:41:34,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:41:34,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:41:34,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:41:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,007 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 03:41:35,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 03:41:35,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2022-11-03 03:41:35,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:35,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-03 03:41:37,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:37,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:37,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:37,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:37,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:37,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:37,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:37,851 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:41:37,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 611 treesize of output 525 [2022-11-03 03:41:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:39,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:39,015 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:39,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:39,273 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:39,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:39,345 INFO L356 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-03 03:41:39,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-03 03:41:39,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:39,420 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:39,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:39,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-03 03:41:39,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:41:40,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-03 03:41:40,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:41:40,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:41:40,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-03 03:41:40,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136616252] [2022-11-03 03:41:40,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-03 03:41:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-03 03:41:40,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-11-03 03:41:40,437 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-03 03:41:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:41:41,690 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-11-03 03:41:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-03 03:41:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-11-03 03:41:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:41:41,693 INFO L225 Difference]: With dead ends: 259 [2022-11-03 03:41:41,693 INFO L226 Difference]: Without dead ends: 243 [2022-11-03 03:41:41,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:41:41,695 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 444 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 381 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 381 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 03:41:41,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 84 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [381 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 03:41:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-03 03:41:41,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-11-03 03:41:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-03 03:41:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-11-03 03:41:41,723 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-11-03 03:41:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:41:41,724 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-11-03 03:41:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-03 03:41:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-11-03 03:41:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-03 03:41:41,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:41:41,731 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-03 03:41:41,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:41:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:41,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:41:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:41:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-11-03 03:41:41,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:41:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217050539] [2022-11-03 03:41:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:41:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:41:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-03 03:41:44,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:41:44,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217050539] [2022-11-03 03:41:44,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217050539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:41:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965285075] [2022-11-03 03:41:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:41:44,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:41:44,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:41:44,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:41:44,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:41:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:41:44,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-03 03:41:44,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:41:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-03 03:41:45,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:41:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-03 03:41:47,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965285075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:41:47,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835422574] [2022-11-03 03:41:47,289 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:41:47,289 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:41:47,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:41:47,290 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:41:47,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:41:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,463 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 03:41:47,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 03:41:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 46 [2022-11-03 03:41:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:47,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-03 03:41:50,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:50,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:50,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:50,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:50,559 INFO L356 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-03 03:41:50,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 561 treesize of output 527 [2022-11-03 03:41:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:55,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:55,392 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:55,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:56,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:41:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:56,250 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:41:56,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:41:56,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:56,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:56,374 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:56,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:56,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:41:56,462 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:41:56,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:41:56,759 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-03 03:41:56,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:41:58,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-03 03:41:58,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:41:58,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:41:58,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-03 03:41:58,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847541831] [2022-11-03 03:41:58,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:41:58,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-03 03:41:58,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:41:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-03 03:41:58,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-11-03 03:41:58,881 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-03 03:42:02,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:42:02,036 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-11-03 03:42:02,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-03 03:42:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-11-03 03:42:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:42:02,042 INFO L225 Difference]: With dead ends: 535 [2022-11-03 03:42:02,043 INFO L226 Difference]: Without dead ends: 507 [2022-11-03 03:42:02,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-11-03 03:42:02,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1152 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:42:02,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1155 Valid, 174 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 03:42:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-03 03:42:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-11-03 03:42:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-03 03:42:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-11-03 03:42:02,107 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-11-03 03:42:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:42:02,109 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-11-03 03:42:02,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-03 03:42:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-11-03 03:42:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-03 03:42:02,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:42:02,130 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-03 03:42:02,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:42:02,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:42:02,353 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:42:02,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:42:02,354 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-11-03 03:42:02,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:42:02,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117143900] [2022-11-03 03:42:02,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:42:02,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:42:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:42:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-11-03 03:42:08,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:42:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117143900] [2022-11-03 03:42:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117143900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:42:08,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931784737] [2022-11-03 03:42:08,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:42:08,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:08,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:08,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:08,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:45:42,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-03 03:45:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:45:42,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 03:45:42,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:45:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2022-11-03 03:45:44,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:45:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 24127 trivial. 0 not checked. [2022-11-03 03:45:49,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931784737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:45:49,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126808659] [2022-11-03 03:45:49,126 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-03 03:45:49,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:45:49,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:45:49,127 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:45:49,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:45:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,227 INFO L356 Elim1Store]: treesize reduction 140, result has 24.3 percent of original size [2022-11-03 03:45:49,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 66 [2022-11-03 03:45:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,381 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 03:45:49,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 03:45:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:49,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 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 [2022-11-03 03:45:51,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:52,034 INFO L356 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-03 03:45:52,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 611 treesize of output 525 [2022-11-03 03:45:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:53,139 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:45:53,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:45:53,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:45:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:53,360 INFO L356 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-03 03:45:53,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-03 03:45:53,423 INFO L356 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-03 03:45:53,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-03 03:45:53,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:53,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:45:53,498 INFO L356 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-03 03:45:53,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-03 03:45:53,589 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-03 03:45:53,590 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:45:57,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9154#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-03 03:45:57,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:45:57,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:45:57,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 50] total 145 [2022-11-03 03:45:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197134587] [2022-11-03 03:45:57,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:45:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-11-03 03:45:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:45:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-11-03 03:45:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9699, Invalid=14171, Unknown=0, NotChecked=0, Total=23870 [2022-11-03 03:45:57,149 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) [2022-11-03 03:46:07,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:46:07,623 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-11-03 03:46:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-03 03:46:07,625 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) Word has length 558 [2022-11-03 03:46:07,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:46:07,634 INFO L225 Difference]: With dead ends: 1087 [2022-11-03 03:46:07,634 INFO L226 Difference]: Without dead ends: 1035 [2022-11-03 03:46:07,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1768 GetRequests, 1521 SyntacticMatches, 47 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27712 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=14493, Invalid=26109, Unknown=0, NotChecked=0, Total=40602 [2022-11-03 03:46:07,644 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2573 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 2607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2711 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2607 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:46:07,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2711 Valid, 351 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2607 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-03 03:46:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-03 03:46:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-11-03 03:46:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-03 03:46:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-11-03 03:46:07,729 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-11-03 03:46:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:46:07,731 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-11-03 03:46:07,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.4) internal successors, (203), 145 states have internal predecessors, (203), 48 states have call successors, (144), 2 states have call predecessors, (144), 2 states have return successors, (144), 48 states have call predecessors, (144), 48 states have call successors, (144) [2022-11-03 03:46:07,732 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-11-03 03:46:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-11-03 03:46:07,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:46:07,791 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-03 03:46:07,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:46:07,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:07,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:46:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:46:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-11-03 03:46:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:46:07,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738034646] [2022-11-03 03:46:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:46:07,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:46:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:46:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-11-03 03:46:32,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:46:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738034646] [2022-11-03 03:46:32,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738034646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:46:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061305917] [2022-11-03 03:46:32,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:46:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:46:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:46:32,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:46:32,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05ef6fbf-cd0c-4647-976a-e5095ad629a1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process