./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta --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 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e --- 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-dbf71c6-m [2022-10-17 17:36:27,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:36:27,064 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:36:27,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:36:27,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:36:27,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:36:27,098 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:36:27,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:36:27,104 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:36:27,105 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:36:27,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:36:27,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:36:27,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:36:27,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:36:27,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:36:27,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:36:27,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:36:27,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:36:27,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:36:27,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:36:27,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:36:27,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:36:27,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:36:27,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:36:27,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:36:27,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:36:27,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:36:27,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:36:27,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:36:27,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:36:27,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:36:27,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:36:27,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:36:27,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:36:27,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:36:27,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:36:27,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:36:27,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:36:27,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:36:27,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:36:27,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:36:27,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:36:27,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:36:27,202 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:36:27,202 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:36:27,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:36:27,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:36:27,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:36:27,204 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:36:27,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:36:27,205 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:36:27,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:36:27,206 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:36:27,210 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:36:27,211 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:36:27,211 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:36:27,211 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:36:27,211 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:36:27,212 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:36:27,212 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:36:27,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:36:27,213 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:36:27,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:36:27,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:36:27,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:36:27,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:36:27,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:36:27,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:36:27,222 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:36:27,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:36:27,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:36:27,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:36:27,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:36:27,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:36:27,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:27,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:36:27,225 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:36:27,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:36:27,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:36:27,227 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:36:27,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:36:27,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:36:27,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:36:27,228 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_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e [2022-10-17 17:36:27,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:36:27,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:36:27,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:36:27,528 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:36:27,529 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:36:27,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2022-10-17 17:36:27,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/data/366e064db/f8f8eb64518d488d9ea4ef71e26bc6c2/FLAG1416e5766 [2022-10-17 17:36:28,141 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:36:28,142 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2022-10-17 17:36:28,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/data/366e064db/f8f8eb64518d488d9ea4ef71e26bc6c2/FLAG1416e5766 [2022-10-17 17:36:28,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/data/366e064db/f8f8eb64518d488d9ea4ef71e26bc6c2 [2022-10-17 17:36:28,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:36:28,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:36:28,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:28,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:36:28,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:36:28,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:28" (1/1) ... [2022-10-17 17:36:28,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71016821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:28, skipping insertion in model container [2022-10-17 17:36:28,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:36:28" (1/1) ... [2022-10-17 17:36:28,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:36:28,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:36:28,917 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_9edf6cd7-48b9-492a-8a5a-69521521aa1f/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2022-10-17 17:36:28,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:28,943 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:36:29,004 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_9edf6cd7-48b9-492a-8a5a-69521521aa1f/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2022-10-17 17:36:29,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:36:29,036 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:36:29,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29 WrapperNode [2022-10-17 17:36:29,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:36:29,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:29,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:36:29,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:36:29,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,062 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,115 INFO L138 Inliner]: procedures = 119, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 118 [2022-10-17 17:36:29,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:36:29,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:36:29,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:36:29,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:36:29,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,187 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:36:29,193 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:36:29,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:36:29,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:36:29,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (1/1) ... [2022-10-17 17:36:29,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:36:29,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:29,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:36:29,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:36:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:36:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:36:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:36:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:36:29,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:36:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:36:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:36:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:36:29,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:36:29,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:36:29,454 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:36:29,457 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:36:29,797 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:36:29,866 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:36:29,866 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-10-17 17:36:29,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:29 BoogieIcfgContainer [2022-10-17 17:36:29,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:36:29,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:36:29,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:36:29,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:36:29,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:36:28" (1/3) ... [2022-10-17 17:36:29,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab876d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:29, skipping insertion in model container [2022-10-17 17:36:29,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:36:29" (2/3) ... [2022-10-17 17:36:29,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab876d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:36:29, skipping insertion in model container [2022-10-17 17:36:29,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:36:29" (3/3) ... [2022-10-17 17:36:29,882 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2022-10-17 17:36:29,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:36:29,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:36:29,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:36:29,993 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;@31c02826, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:36:29,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:36:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:30,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:36:30,017 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:30,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:30,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:30,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:30,030 INFO L85 PathProgramCache]: Analyzing trace with hash 547566873, now seen corresponding path program 1 times [2022-10-17 17:36:30,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:30,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676125708] [2022-10-17 17:36:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:30,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:30,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676125708] [2022-10-17 17:36:30,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676125708] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:30,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:30,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:36:30,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878375607] [2022-10-17 17:36:30,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:30,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:36:30,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:30,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:36:30,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:36:30,433 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-10-17 17:36:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:30,495 INFO L93 Difference]: Finished difference Result 38 states and 59 transitions. [2022-10-17 17:36:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:36:30,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:36:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:30,512 INFO L225 Difference]: With dead ends: 38 [2022-10-17 17:36:30,513 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 17:36:30,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:36:30,522 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:30,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:36:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 17:36:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 17:36:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-10-17 17:36:30,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2022-10-17 17:36:30,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:30,566 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-10-17 17:36:30,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-10-17 17:36:30,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-10-17 17:36:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 17:36:30,568 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:30,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:30,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:36:30,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash 339951912, now seen corresponding path program 1 times [2022-10-17 17:36:30,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:30,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983741248] [2022-10-17 17:36:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:31,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:31,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983741248] [2022-10-17 17:36:31,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983741248] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:31,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:31,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:31,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729002847] [2022-10-17 17:36:31,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:31,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:31,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:31,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:31,334 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:31,769 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-10-17 17:36:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:36:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-10-17 17:36:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:31,775 INFO L225 Difference]: With dead ends: 50 [2022-10-17 17:36:31,776 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 17:36:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:36:31,784 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:31,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 60 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:36:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 17:36:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2022-10-17 17:36:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 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) [2022-10-17 17:36:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-10-17 17:36:31,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2022-10-17 17:36:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:31,795 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-10-17 17:36:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-10-17 17:36:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:36:31,799 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:31,799 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:31,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:36:31,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1779401325, now seen corresponding path program 1 times [2022-10-17 17:36:31,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:31,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760084715] [2022-10-17 17:36:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:31,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:32,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:32,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760084715] [2022-10-17 17:36:32,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760084715] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:32,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932048845] [2022-10-17 17:36:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:32,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:32,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:32,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:36:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 17:36:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:32,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:32,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-10-17 17:36:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:32,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:36:32,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932048845] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:32,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:32,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-10-17 17:36:32,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319057374] [2022-10-17 17:36:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:32,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:36:32,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:32,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:36:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-10-17 17:36:32,566 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-10-17 17:36:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:32,724 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-10-17 17:36:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:36:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:36:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:32,726 INFO L225 Difference]: With dead ends: 45 [2022-10-17 17:36:32,726 INFO L226 Difference]: Without dead ends: 37 [2022-10-17 17:36:32,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:36:32,728 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:32,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:36:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-10-17 17:36:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-10-17 17:36:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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) [2022-10-17 17:36:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-10-17 17:36:32,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2022-10-17 17:36:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:32,744 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-10-17 17:36:32,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-10-17 17:36:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-10-17 17:36:32,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:36:32,746 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:32,746 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:32,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:32,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:32,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:32,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1032126435, now seen corresponding path program 1 times [2022-10-17 17:36:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584862192] [2022-10-17 17:36:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:33,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584862192] [2022-10-17 17:36:33,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584862192] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:33,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450924024] [2022-10-17 17:36:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:33,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:33,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:33,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:33,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:36:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:33,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 56 conjunts are in the unsatisfiable core [2022-10-17 17:36:33,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:33,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:33,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:36:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2022-10-17 17:36:34,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2022-10-17 17:36:34,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-10-17 17:36:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,051 INFO L356 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2022-10-17 17:36:34,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 69 [2022-10-17 17:36:34,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-10-17 17:36:34,090 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 17:36:34,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-17 17:36:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,275 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 0 case distinctions, treesize of input 16 treesize of output 17 [2022-10-17 17:36:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-10-17 17:36:34,303 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-10-17 17:36:34,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-10-17 17:36:34,326 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-10-17 17:36:34,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 41 [2022-10-17 17:36:34,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:36:34,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-10-17 17:36:34,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:36:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:34,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:36:34,543 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_327 (Array Int Int)) (|v_ULTIMATE.start_main_~head~0#1.base_14| Int)) (or (not (= (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~head~0#1.base_14| v_ArrVal_327) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)) 1)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~head~0#1.base_14|) 0)))) is different from false [2022-10-17 17:36:34,591 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:34,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2022-10-17 17:36:34,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-10-17 17:36:34,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 61 [2022-10-17 17:36:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-10-17 17:36:34,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450924024] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:36:34,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885230199] [2022-10-17 17:36:34,811 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:36:34,812 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:36:34,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:36:34,821 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:36:34,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:36:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:34,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,902 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 17:36:34,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 50 [2022-10-17 17:36:34,937 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-17 17:36:34,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-10-17 17:36:34,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:34,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:34,991 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:34,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-10-17 17:36:35,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:35,207 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-10-17 17:36:35,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 33 [2022-10-17 17:36:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 33 [2022-10-17 17:36:35,382 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-10-17 17:36:35,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-10-17 17:36:35,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 55 treesize of output 40 [2022-10-17 17:36:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 44 treesize of output 42 [2022-10-17 17:36:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 40 [2022-10-17 17:36:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 40 [2022-10-17 17:36:35,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-10-17 17:36:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:35,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,139 INFO L356 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-10-17 17:36:36,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 383 treesize of output 337 [2022-10-17 17:36:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,617 INFO L356 Elim1Store]: treesize reduction 150, result has 20.2 percent of original size [2022-10-17 17:36:36,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 534 treesize of output 434 [2022-10-17 17:36:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,852 INFO L356 Elim1Store]: treesize reduction 307, result has 13.8 percent of original size [2022-10-17 17:36:36,853 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 10 case distinctions, treesize of input 410 treesize of output 368 [2022-10-17 17:36:36,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:36,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:36,956 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:36:36,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 389 treesize of output 352 [2022-10-17 17:36:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,018 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 17:36:37,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 352 [2022-10-17 17:36:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,102 INFO L356 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2022-10-17 17:36:37,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 361 [2022-10-17 17:36:37,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,175 INFO L356 Elim1Store]: treesize reduction 142, result has 11.8 percent of original size [2022-10-17 17:36:37,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 409 treesize of output 389 [2022-10-17 17:36:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,253 INFO L356 Elim1Store]: treesize reduction 94, result has 14.5 percent of original size [2022-10-17 17:36:37,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 365 [2022-10-17 17:36:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,332 INFO L356 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2022-10-17 17:36:37,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 365 treesize of output 369 [2022-10-17 17:36:37,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:37,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,841 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:37,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 116 [2022-10-17 17:36:37,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:37,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,927 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-10-17 17:36:37,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 22 [2022-10-17 17:36:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:37,971 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:37,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 81 [2022-10-17 17:36:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:37,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:37,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:38,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:38,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:38,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:38,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:38,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:38,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,344 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-10-17 17:36:38,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-10-17 17:36:38,427 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:38,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 100 [2022-10-17 17:36:38,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:38,457 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-10-17 17:36:38,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 70 [2022-10-17 17:36:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:38,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:38,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:38,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:38,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:38,517 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:36:39,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '460#(and (= 1 (select (select |#memory_int| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 8))) (< |ULTIMATE.start_main_~head~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= (select |#length| |ULTIMATE.start_main_~head~0#1.base|) 12) (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ 8 |ULTIMATE.start_main_~x~0#1.offset|)) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) (+ |ULTIMATE.start_main_~head~0#1.offset| 4)) 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_~x~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (= |#NULL.base| 0))' at error location [2022-10-17 17:36:39,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:36:39,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:36:39,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-10-17 17:36:39,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828772421] [2022-10-17 17:36:39,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:36:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 17:36:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 17:36:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=443, Unknown=2, NotChecked=42, Total=552 [2022-10-17 17:36:39,149 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:39,650 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-10-17 17:36:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:36:39,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:36:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:39,652 INFO L225 Difference]: With dead ends: 57 [2022-10-17 17:36:39,652 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 17:36:39,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=4, NotChecked=52, Total=812 [2022-10-17 17:36:39,654 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:39,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 126 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 97 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-10-17 17:36:39,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 17:36:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-10-17 17:36:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 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) [2022-10-17 17:36:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-10-17 17:36:39,661 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 14 [2022-10-17 17:36:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:39,662 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-10-17 17:36:39,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-10-17 17:36:39,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:36:39,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:39,663 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:39,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:39,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:39,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:39,887 INFO L85 PathProgramCache]: Analyzing trace with hash -7410200, now seen corresponding path program 1 times [2022-10-17 17:36:39,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:39,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547771087] [2022-10-17 17:36:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:39,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:40,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:40,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547771087] [2022-10-17 17:36:40,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547771087] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:40,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133734389] [2022-10-17 17:36:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:40,218 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:40,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:36:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 49 conjunts are in the unsatisfiable core [2022-10-17 17:36:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:40,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:40,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:40,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2022-10-17 17:36:40,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2022-10-17 17:36:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-17 17:36:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:40,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-17 17:36:40,437 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-10-17 17:36:40,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-10-17 17:36:40,715 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-10-17 17:36:40,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 42 [2022-10-17 17:36:40,726 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-17 17:36:40,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2022-10-17 17:36:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:40,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:36:40,879 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:40,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2022-10-17 17:36:40,888 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:40,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2022-10-17 17:36:40,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:36:40,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:36:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:41,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133734389] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:41,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 17:36:41,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 7] total 15 [2022-10-17 17:36:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494070225] [2022-10-17 17:36:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:36:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:41,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:36:41,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:36:41,157 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:41,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:41,443 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2022-10-17 17:36:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:36:41,444 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 17:36:41,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:41,444 INFO L225 Difference]: With dead ends: 48 [2022-10-17 17:36:41,445 INFO L226 Difference]: Without dead ends: 35 [2022-10-17 17:36:41,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:36:41,446 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:41,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 60 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-10-17 17:36:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-10-17 17:36:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-10-17 17:36:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 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) [2022-10-17 17:36:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2022-10-17 17:36:41,460 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 15 [2022-10-17 17:36:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:41,460 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2022-10-17 17:36:41,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2022-10-17 17:36:41,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:36:41,462 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:41,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:41,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:41,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:41,683 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:41,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1072665624, now seen corresponding path program 1 times [2022-10-17 17:36:41,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:41,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914871881] [2022-10-17 17:36:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:41,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:42,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:42,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914871881] [2022-10-17 17:36:42,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914871881] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:42,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:42,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 17:36:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145055824] [2022-10-17 17:36:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:36:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:36:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:36:42,019 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:42,258 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2022-10-17 17:36:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:36:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 17:36:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:42,260 INFO L225 Difference]: With dead ends: 69 [2022-10-17 17:36:42,260 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 17:36:42,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:42,261 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:42,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 17:36:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-10-17 17:36:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 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) [2022-10-17 17:36:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-10-17 17:36:42,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 15 [2022-10-17 17:36:42,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:42,270 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-10-17 17:36:42,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-10-17 17:36:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:36:42,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:42,271 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:42,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:36:42,272 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash 491912158, now seen corresponding path program 2 times [2022-10-17 17:36:42,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220139277] [2022-10-17 17:36:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:42,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:43,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220139277] [2022-10-17 17:36:43,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220139277] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477904268] [2022-10-17 17:36:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:36:43,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:43,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:43,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:43,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:36:44,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:36:44,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:36:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 73 conjunts are in the unsatisfiable core [2022-10-17 17:36:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:44,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-10-17 17:36:44,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:44,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-10-17 17:36:44,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2022-10-17 17:36:44,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 39 [2022-10-17 17:36:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:44,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-10-17 17:36:44,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-10-17 17:36:44,528 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 17:36:44,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-17 17:36:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,633 INFO L356 Elim1Store]: treesize reduction 137, result has 7.4 percent of original size [2022-10-17 17:36:44,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 38 [2022-10-17 17:36:44,663 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:44,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-10-17 17:36:44,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,808 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 0 case distinctions, treesize of input 16 treesize of output 17 [2022-10-17 17:36:44,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:44,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-10-17 17:36:44,844 INFO L356 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2022-10-17 17:36:44,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2022-10-17 17:36:44,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-17 17:36:44,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-10-17 17:36:44,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:36:44,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 17:36:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:44,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:36:45,002 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~head~0#1.base_19| Int) (v_ArrVal_774 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~head~0#1.base_19|) 0)) (not (= 1 (select (select (store |c_#memory_int| |v_ULTIMATE.start_main_~head~0#1.base_19| v_ArrVal_774) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 8)))))) is different from false [2022-10-17 17:36:45,033 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:45,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-10-17 17:36:45,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 69 [2022-10-17 17:36:45,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2022-10-17 17:36:45,235 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:36:45,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 152 [2022-10-17 17:36:45,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 234 [2022-10-17 17:36:45,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 217 [2022-10-17 17:36:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 4 not checked. [2022-10-17 17:36:45,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477904268] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:36:45,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332685236] [2022-10-17 17:36:45,838 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-10-17 17:36:45,838 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:36:45,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:36:45,839 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:36:45,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:36:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,884 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 17:36:45,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 32 [2022-10-17 17:36:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-10-17 17:36:45,928 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:45,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-10-17 17:36:45,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-10-17 17:36:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:45,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,125 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-10-17 17:36:46,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 33 [2022-10-17 17:36:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 33 [2022-10-17 17:36:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,275 INFO L356 Elim1Store]: treesize reduction 50, result has 39.0 percent of original size [2022-10-17 17:36:46,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 64 [2022-10-17 17:36:46,326 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-10-17 17:36:46,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-10-17 17:36:46,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 40 [2022-10-17 17:36:46,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-10-17 17:36:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 40 [2022-10-17 17:36:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,855 INFO L356 Elim1Store]: treesize reduction 251, result has 14.0 percent of original size [2022-10-17 17:36:46,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 383 treesize of output 328 [2022-10-17 17:36:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:46,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,030 INFO L356 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-10-17 17:36:47,031 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 8 case distinctions, treesize of input 408 treesize of output 346 [2022-10-17 17:36:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,122 INFO L356 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2022-10-17 17:36:47,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 457 treesize of output 393 [2022-10-17 17:36:47,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,206 INFO L356 Elim1Store]: treesize reduction 142, result has 11.8 percent of original size [2022-10-17 17:36:47,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 444 treesize of output 416 [2022-10-17 17:36:47,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,310 INFO L356 Elim1Store]: treesize reduction 94, result has 14.5 percent of original size [2022-10-17 17:36:47,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 365 [2022-10-17 17:36:47,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,426 INFO L356 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2022-10-17 17:36:47,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 365 treesize of output 369 [2022-10-17 17:36:47,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,475 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:36:47,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 389 treesize of output 352 [2022-10-17 17:36:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,519 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 17:36:47,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 352 [2022-10-17 17:36:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:47,572 INFO L356 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2022-10-17 17:36:47,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 361 [2022-10-17 17:36:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:47,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:47,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:47,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:47,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,025 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:48,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 116 [2022-10-17 17:36:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,113 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-10-17 17:36:48,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 22 [2022-10-17 17:36:48,139 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:48,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 108 [2022-10-17 17:36:48,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:48,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-10-17 17:36:48,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:48,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:48,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:48,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:48,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,559 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:48,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 116 [2022-10-17 17:36:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:48,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,640 INFO L356 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2022-10-17 17:36:48,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 22 [2022-10-17 17:36:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:48,678 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:48,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 81 [2022-10-17 17:36:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:48,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:48,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:48,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:48,718 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:36:49,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1074#(and (< |ULTIMATE.start_main_~head~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= (select |#length| |ULTIMATE.start_main_~head~0#1.base|) 12) (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ 8 |ULTIMATE.start_main_~x~0#1.offset|)) 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) 4) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) 0) 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) 4) 0) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (= |ULTIMATE.start_main_~x~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~head~0#1.base|) 8) 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:36:49,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:36:49,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:36:49,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-10-17 17:36:49,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957654171] [2022-10-17 17:36:49,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:36:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 17:36:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 17:36:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=574, Unknown=2, NotChecked=48, Total=702 [2022-10-17 17:36:49,365 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:50,069 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-10-17 17:36:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 17:36:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 17:36:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:50,071 INFO L225 Difference]: With dead ends: 74 [2022-10-17 17:36:50,071 INFO L226 Difference]: Without dead ends: 72 [2022-10-17 17:36:50,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=910, Unknown=2, NotChecked=62, Total=1122 [2022-10-17 17:36:50,073 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 95 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:50,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 206 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 143 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-10-17 17:36:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-10-17 17:36:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2022-10-17 17:36:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 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) [2022-10-17 17:36:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-10-17 17:36:50,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2022-10-17 17:36:50,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:50,081 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-10-17 17:36:50,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-10-17 17:36:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:36:50,083 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:50,083 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:50,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:36:50,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:50,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1463614765, now seen corresponding path program 1 times [2022-10-17 17:36:50,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:50,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357836261] [2022-10-17 17:36:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:50,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:50,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357836261] [2022-10-17 17:36:50,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357836261] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:50,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:50,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:36:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728139422] [2022-10-17 17:36:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:36:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:36:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:50,599 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:50,874 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-10-17 17:36:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 17:36:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 17:36:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:50,875 INFO L225 Difference]: With dead ends: 62 [2022-10-17 17:36:50,875 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 17:36:50,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-10-17 17:36:50,876 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:50,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 58 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:36:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 17:36:50,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-10-17 17:36:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 37 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-10-17 17:36:50,885 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 17 [2022-10-17 17:36:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:50,886 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-10-17 17:36:50,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-10-17 17:36:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:36:50,891 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:50,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:50,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 17:36:50,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:50,892 INFO L85 PathProgramCache]: Analyzing trace with hash 425816397, now seen corresponding path program 1 times [2022-10-17 17:36:50,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:50,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313499569] [2022-10-17 17:36:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:50,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:52,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313499569] [2022-10-17 17:36:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313499569] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:36:52,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759631395] [2022-10-17 17:36:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:52,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:52,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:36:52,146 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:36:52,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:36:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 77 conjunts are in the unsatisfiable core [2022-10-17 17:36:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:36:52,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:52,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 108 [2022-10-17 17:36:52,416 INFO L356 Elim1Store]: treesize reduction 56, result has 33.3 percent of original size [2022-10-17 17:36:52,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: v_arrayElimArr_14 input size 87 context size 87 output size 87 [2022-10-17 17:36:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [42898859] [2022-10-17 17:36:52,419 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:36:52,419 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:36:52,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:36:52,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:36:52,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:36:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:52,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,477 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-10-17 17:36:52,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 50 [2022-10-17 17:36:52,510 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-10-17 17:36:52,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-10-17 17:36:52,548 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:52,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 41 [2022-10-17 17:36:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 33 [2022-10-17 17:36:52,917 INFO L356 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-10-17 17:36:52,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2022-10-17 17:36:52,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:52,962 INFO L356 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2022-10-17 17:36:52,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 48 [2022-10-17 17:36:52,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:52,993 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-10-17 17:36:52,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 33 [2022-10-17 17:36:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 40 [2022-10-17 17:36:53,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,044 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-10-17 17:36:53,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 60 [2022-10-17 17:36:53,085 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-10-17 17:36:53,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-10-17 17:36:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:53,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:53,697 INFO L356 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-10-17 17:36:53,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 383 treesize of output 337 [2022-10-17 17:36:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:53,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,031 INFO L356 Elim1Store]: treesize reduction 150, result has 20.2 percent of original size [2022-10-17 17:36:54,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 534 treesize of output 434 [2022-10-17 17:36:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,245 INFO L356 Elim1Store]: treesize reduction 307, result has 13.8 percent of original size [2022-10-17 17:36:54,246 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 10 case distinctions, treesize of input 410 treesize of output 368 [2022-10-17 17:36:54,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,310 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:36:54,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 389 treesize of output 352 [2022-10-17 17:36:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,355 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-10-17 17:36:54,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 352 [2022-10-17 17:36:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,419 INFO L356 Elim1Store]: treesize reduction 50, result has 25.4 percent of original size [2022-10-17 17:36:54,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 374 treesize of output 361 [2022-10-17 17:36:54,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,489 INFO L356 Elim1Store]: treesize reduction 142, result has 11.8 percent of original size [2022-10-17 17:36:54,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 409 treesize of output 389 [2022-10-17 17:36:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,559 INFO L356 Elim1Store]: treesize reduction 94, result has 14.5 percent of original size [2022-10-17 17:36:54,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 365 [2022-10-17 17:36:54,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,696 INFO L356 Elim1Store]: treesize reduction 138, result has 10.4 percent of original size [2022-10-17 17:36:54,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 365 treesize of output 369 [2022-10-17 17:36:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:54,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,091 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-10-17 17:36:55,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:55,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-10-17 17:36:55,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:55,188 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:55,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 100 [2022-10-17 17:36:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:55,219 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-10-17 17:36:55,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 70 [2022-10-17 17:36:55,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:55,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:55,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:55,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2022-10-17 17:36:55,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:55,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:55,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-10-17 17:36:55,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:55,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,571 INFO L356 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2022-10-17 17:36:55,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 18 [2022-10-17 17:36:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 22 [2022-10-17 17:36:55,657 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 17:36:55,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-10-17 17:36:55,691 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-10-17 17:36:55,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 100 [2022-10-17 17:36:55,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:36:55,723 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-10-17 17:36:55,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 70 [2022-10-17 17:36:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 15 [2022-10-17 17:36:55,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:36:55,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 9 [2022-10-17 17:36:55,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:36:56,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1410#(and (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:36:56,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:36:56,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:36:56,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-17 17:36:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009519750] [2022-10-17 17:36:56,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 17:36:56,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:36:56,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:36:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-10-17 17:36:56,171 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:56,797 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-10-17 17:36:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:36:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 17:36:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:56,798 INFO L225 Difference]: With dead ends: 75 [2022-10-17 17:36:56,798 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 17:36:56,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-10-17 17:36:56,800 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:56,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 125 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:36:56,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 17:36:56,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2022-10-17 17:36:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 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) [2022-10-17 17:36:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-10-17 17:36:56,810 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 17 [2022-10-17 17:36:56,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:56,810 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-10-17 17:36:56,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-10-17 17:36:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:36:56,811 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:56,812 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:56,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-17 17:36:57,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9edf6cd7-48b9-492a-8a5a-69521521aa1f/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:36:57,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash 403061201, now seen corresponding path program 1 times [2022-10-17 17:36:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:57,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526923580] [2022-10-17 17:36:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:36:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:36:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:36:57,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:36:57,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526923580] [2022-10-17 17:36:57,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526923580] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:36:57,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:36:57,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:36:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923421493] [2022-10-17 17:36:57,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:36:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:36:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:36:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:36:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:36:57,185 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:36:57,356 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2022-10-17 17:36:57,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:36:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-17 17:36:57,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:36:57,357 INFO L225 Difference]: With dead ends: 62 [2022-10-17 17:36:57,357 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 17:36:57,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:36:57,358 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:36:57,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:36:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 17:36:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-17 17:36:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:57,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-10-17 17:36:57,371 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 18 [2022-10-17 17:36:57,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:36:57,373 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-10-17 17:36:57,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:36:57,373 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-10-17 17:36:57,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:36:57,374 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:36:57,374 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:36:57,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 17:36:57,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:36:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:36:57,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1182546770, now seen corresponding path program 1 times [2022-10-17 17:36:57,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:36:57,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448393477] [2022-10-17 17:36:57,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:36:57,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms